Part of PICRYL.com. Not developed or endorsed by the Library of Congress

library of congress

united states history

safety film negatives

glass negatives

1940 s

plant

production

aircraft

california

tests

public
243 media by topic ∙ page 1 of 3
JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS. THE PLANE WITH RUFUS R. BERMANN, WIRELESS OPERATOR, AND FRED AUBERT

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS....

Picryl description: Public domain image of an aircraft, aviator, 1910s-1920s, early 20th-century aviation, free to use, no copyright restrictions.

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS. FLIGHTS OF PLANE

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS....

Picryl description: Public domain image of an aircraft, aviator, 1910s-1920s, early 20th-century aviation, free to use, no copyright restrictions.

Tests of the new Armoured trucks of the Post Office Department at Fort Meyer today. The windows and wind shields are of bullet proof glass. This photo snaped [sic] at the moment of impact, plainly shows the fine splinters of flying glass, 12/1/21

Tests of the new Armoured trucks of the Post Office Department at Fort...

Public domain photograph of an automobile, 1920s car, free to use, no copyright restrictions image - Picryl description

Conducting moisture tests on sample of rice. State rice mill, Crowley, Louisiana

Conducting moisture tests on sample of rice. State rice mill, Crowley,...

Public domain photograph of 1930s-1940s US industrial development, Second World War, US war production, indusry, no copyright restrictions image - Picryl description

A black and white photo of a man eating corn, Iowa. Farm Security Administration photograph

A black and white photo of a man eating corn, Iowa. Farm Security Admi...

Picryl description: Public domain photograph of a farmer, 1930s great depression, dust bowl era, 20th century, free to use, no copyright restrictions.

Dr. G.I. Jones, associate chemist, conducts tests in determination of vitamin B complex in dehydrated vegetables. Regional agricultural research laboratory, Albany, California. This test must be conducted in light of certain quality which will not destroy vitamins in solutions

Dr. G.I. Jones, associate chemist, conducts tests in determination of ...

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

North American P-51 fighters await flight tests on the flight ramp. The P-51 is the Army Air Force's newest fighter

North American P-51 fighters await flight tests on the flight ramp. Th...

Picryl description: Public domain image of a military aircraft, assembly line, industrial facility, 1930s aviation, free to use, no copyright restrictions.

Production. B-17 heavy bomber. Fueling a new B-17F (Flying Fortress) bombers at the airfield of Boeing's Seattle plant. Ships are delivered to the Army and the Navy after they have successfully undergone flight tests. The Flying Fortress has performed with great credit in the South Pacific, over Germany and elsewhere. It is a four-engine heavy bomber capable of flying at high altitudes

Production. B-17 heavy bomber. Fueling a new B-17F (Flying Fortress) b...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

A mountain biker tests a rugged path amid the rock formations in Palo Duro Canyon State Park in the Texas panhandle

A mountain biker tests a rugged path amid the rock formations in Palo ...

Title, date, and keywords based on information provided by the photographer. Credit line: The Lyda Hill Texas Collection of Photographs in Carol M. Highsmith's America Project, Library of Congress, Prints and P... More

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS. TESTS

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS....

A black and white photo of a plane in a field, Library of Congress Harris and Ewing collection Title from unverified caption data received with the Harris & Ewing Collection. Gift; Harris & Ewing, Inc. 1955. G... More

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS. MISS LAURA MERRIAM IN PLANE WITH JANNUS

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS....

A group of people sitting on top of an airplane. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

CURTISS AIRPLANE. TESTS OF CURTISS PLANE FOR ARMY. JAPANESE WATCHING TESTS: COMDR. SAITO; UNIDENTIFIED; COMDR. TOKUTARO HIROGA; COL. K. INOUYO

CURTISS AIRPLANE. TESTS OF CURTISS PLANE FOR ARMY. JAPANESE WATCHING T...

A group of men standing next to each other in a field. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

CURTISS AIRPLANE. TESTS OF CURTISS PLANE FOR ARMY. SECRETARY OF WAR DICKINSON AND GEN. WOOD

CURTISS AIRPLANE. TESTS OF CURTISS PLANE FOR ARMY. SECRETARY OF WAR DI...

A group of men standing next to each other. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

ARMY, U.S. RIFLE TESTS - Public domain image related to music prformance, photograph

ARMY, U.S. RIFLE TESTS - Public domain image related to music prforman...

A man laying on the ground with a gun. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Bureau of Standards puts ruge insulator through pressure tests. Washington, D.C., Nov. 30. H.L. Whitemore, (left), chief of the Engineering Mechanics section, National Bureau of Standards, and Dr. A.H. Stand, make a final check of the huge 1600[?] pound porcelain insulator before subjecting it to 2,180,000 pounds pressure in the Bureau's hydraulic jack. The insulator, one of the few of its size in existence, will serve as a base for a 640 foot mast at Radio Station WGY, Schenectady, New York. One of the insulators successfully stood the pressure to 800,000 pounds while the second broke when the pressure was boosted to 2,180,000 pounds. The hydraulic jack is capable of exerting 10,000,000 pounds pressure

Bureau of Standards puts ruge insulator through pressure tests. Washin...

Public domain photograph of New York building, free to use, no copyright restrictions image - Picryl description

Fighting highway deaths, Wash. D.C. This photograph shows Richard S. Dill, a worker in the U.S. Bureau of Standards, tabulating the efficiency of various kinds of brake linings as the government attempts to determine the best for use on its vehicles. The automobile industry is watching these tests carefully as a possible indication of the kind of brake lining to use to reduce the number of deaths on highways, which numbered 33,980 in 1934, 10/4/35

Fighting highway deaths, Wash. D.C. This photograph shows Richard S. D...

Public domain photograph of people in office, interior, the 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

Bureau of Standards breaks up plates for a reason. Washington, D.C., May 23. Just about everything manufactured in this country is made the subject of tests in the Bureau of Standards here. Even the dinner plates used in restaurants go through a series of tests in order that the government may known just how long it can expect them to last in usage. R.F. Galler, Chief of the White Wear section, is here operating an impact machine to determine the amount of force necessary to cause those germ-concealing chips in a plate. Previous in this test, the plate is ground with porcelain to find out how long a plate may be handled before it loses its gleam, and samples are heated to find out how much heat is necessary to cause cracks to appear in the glazing

Bureau of Standards breaks up plates for a reason. Washington, D.C., M...

A black and white photo of a man in a kitchen, Library of Congress Harris and Ewing collection Title from unverified caption data received with the Harris & Ewing Collection. Gift; Harris & Ewing, Inc. 1955. G... More

Bofors forty-millimeter mounts. Machined to watch-like precision, these hundreds of parts which go into Bofors forty-millimeter anti-aircraft gun mounts and carriages for the U.S. Army must pass the most rigid inspection tests before they can be accepted in the Bofors manufacture. This employee of a large Midwest rubber company, now converted to production of war necessities, examines some of the 1,500 separate parts which are required in the assembling of the Bofors mounts and carriages

Bofors forty-millimeter mounts. Machined to watch-like precision, thes...

Public domain photograph of factory building, free to use, no copyright restrictions image - Picryl description

Production. B-25 bombers. New B-25 bombers lined up for final inspection and tests at the flying field of a Western Aircraft plant. General Doolittle, who flew in a B-25 in the raid on Tokyo, has called this ship the best military plane in existence. It performs brilliantly at its 25,000-foot ceiling. Fairfax bomber plant, Kansas City

Production. B-25 bombers. New B-25 bombers lined up for final inspecti...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

Ensenada, Puerto Rico. Making one of the many periodic tests of the syrup at the South Puerto Rico Sugar Company

Ensenada, Puerto Rico. Making one of the many periodic tests of the sy...

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

CURTISS AIRPLANE. TESTS OF CURTISS PLANE FOR ARMY

CURTISS AIRPLANE. TESTS OF CURTISS PLANE FOR ARMY

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS. FLIGHTS OF PLANE

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS....

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

ARMY, U.S. MACHINE GUN TESTS - Public domain photograph

ARMY, U.S. MACHINE GUN TESTS - Public domain photograph

A group of men standing around a camera. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Traffic paint undergoes rigid tests. Washington, D.C., April 16. At the U.S. Bureau of Standards, J.E. Keefauver of the Bureau has been running tests on the paint that is placed on safety zones and streets to determine which has the best wearing activity. The discs ? are painted with the traffic paint the chain-driven wheel of eraser rubber (to imitate an auto tire) slowly wears the paint away. The brushes are to keep the disc and tire clean. These tests were made at the requests of the traffic bureaus, 4161937

Traffic paint undergoes rigid tests. Washington, D.C., April 16. At th...

A black and white photo of a man working on a machine, Library of Congress Harris and Ewing collection Title from unverified data received with the Harris & Ewing Collection on the negative or negative sleeve.... More

Bureau of Standards making extensive tests of glass building blocks. Washington, D.C., June 20. Hollow glass building blocks are being used more and more extensively for structural purposes when both greater light distribution and air conditioning are required. Extensive tests to determine the strength of glass block walls and their resistance to wind pressure and moisture penetration. A.N. Finn, Chief of the glass section, is inspecting some 8 x 4 feet panels before they are tested, 6/20/38

Bureau of Standards making extensive tests of glass building blocks. W...

Public domain photograph of people in office, interior, the 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

A propeller at the inspection table undergoing tests for pitch and curvature. Hamilton Standard Propeller Corporation. East Hartford, Connecticut

A propeller at the inspection table undergoing tests for pitch and cur...

Public domain photograph of organ, keyboard instrument, church, gothic architecture, free to use, no copyright restrictions image - Picryl description

Production. Lockheed P-38 pursuit planes. A Lockheed P-38 pursuit ship, just returned from flight tests, is checked and reconditioned in the test hangar of a large Western aircraft plant. After these operations, the ship will be ready for delivery to the Army. The P-38 has performed brilliantly in action, notably in the Aleutians. Its long range and great firepower give it real promise as an escort for high-altitude bombers. At its best altitude, the P-38 is one of the world's fastest fighting planes

Production. Lockheed P-38 pursuit planes. A Lockheed P-38 pursuit ship...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

Production. B-25 "Billy Mitchell" bombers. Partial view of one of North American Aviation's B-25 bomber assembly lines at Inglewood, California. When the planes move out the door, they are ready for painting and flight tests. In addition to the battle tested B-25 "Billy Mitchell" bomber, used in General Doolittle's raid on Tokyo, this plant produces the P-51 "Mustang" fighter plane which was first brought into prominence by the British raid on Dieppe

Production. B-25 "Billy Mitchell" bombers. Partial view of one of Nort...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

Miss Dorothy Ehmke, conducting urea tests on the blood of pregnant rats as part of a study of the effect of meat diets on toxemic pregnancy in rats. In the research lab in the home economics department at Iowa State College. Ames, Iowa

Miss Dorothy Ehmke, conducting urea tests on the blood of pregnant rat...

Public domain photograph of college lab, free to use, no copyright restrictions image - Picryl description

Chicago, Illinois. In this machine at the laboratory of the Chicago and Northwestern Railroad various paints, preservatives and other coatings used on railroad equipment are put through severe tests

Chicago, Illinois. In this machine at the laboratory of the Chicago an...

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

A partial view of North American's flight ramp, with P-51 fighters getting final adjustments before flight tests and paint

A partial view of North American's flight ramp, with P-51 fighters get...

Picryl description: Public domain image of a military aircraft, assembly line, industrial facility, 1930s aviation, free to use, no copyright restrictions.

Production. B-17 heavy bomber. An Army sentry guards new B-17F (Flying Fortress) bombers at the airfield of Boeing's Seattle plant. The ship will be delivered to the Army and the Navy after they have successfully undergone flight tests. The Flying Fortress has performed with great credit in the South Pacific, over Germany and elsewhere. It is a four-engine heavy bomber capable of flying at high altitudes

Production. B-17 heavy bomber. An Army sentry guards new B-17F (Flying...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

A skilled machinist on a turret lathe in North America's machine shop tests the accuracy of his work with a micrometer

A skilled machinist on a turret lathe in North America's machine shop ...

Picryl description: Public domain photograph of a machine, worker, factory, industrial equipment, free to use, no copyright restrictions.

Parke, Davis and Company, manufacturing chemists, Detroit, Michigan. White rats used in standardization tests of vitamin B

Parke, Davis and Company, manufacturing chemists, Detroit, Michigan. W...

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

CURTISS AIRPLANE. TESTS OF CURTISS PLANE FOR ARMY. GENERAL VIEWS

CURTISS AIRPLANE. TESTS OF CURTISS PLANE FOR ARMY. GENERAL VIEWS

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

Tire testing machine. Washington, D.C., May 20. Testing wear and tear on tires with this tire testing machine at the Bureau of Standards is W.D. [?] hold, the machine simulates road tests traveling from 20 to 60 mph, the only difference is that the load on the tires is heavier than the normal weight of cars that the tires are made for [...]

Tire testing machine. Washington, D.C., May 20. Testing wear and tear ...

Picryl description: Public domain image of an industrial building, factory, workshop, workers, 20th century, free to use, no copyright restrictions.

Government discovers method to preserve movie film indefinitely. Washington, D.C., July 8. People living in the year 2000 will be able to see and hear today's history in the making through experiments on preserving movie film now being conducted by the National Bureau of Standards. The experts at the bureau recently completed "accelerated aging tests in which films in six months went through the effects of 50 years' storage in a cool dark room. These tests showed that cellulose, or explosive film, would last from 50 to 100 years. The new Safety or Acetate film "may be preserved for longer periods." Unofficially, the experts put the figure at several hundred years. The following set of pictures were made at the Bureau of Standards and the National Archives Building. (1) Accelerated aging, The stability of the films is tested similarly to paper. They are heated in this oven at 100 [degrees] C and tested for loss of flexibility and for evidences of chemical decomposition. Arnold Soorne, of the Bureau Staff, is picture making the test

Government discovers method to preserve movie film indefinitely. Washi...

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

An experimental scale model of the B-25 plane is prepared for wind tunnel tests in the plant of the North American Aviation, Inc., Inglewood, Calif. The model maker holds an exact miniature reproduction of the type of bomb the plane will carry. This plant produces the battle-tested B-25 bomber used in General Doolittle's raid on Tokyo, and the P-51 ("Mustang") fighter plane which was first brought into prominence by the British raid on Dieppe

An experimental scale model of the B-25 plane is prepared for wind tun...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

Sea jeeps. The Army's most flexible new machine of the war, a Ford-built amphibian reconnaissance car, carrying soldiers equipped for combat duty takes to the water in special tests staged recently in the Detroit area. This picture shows how the new transportation arm propelling itself as a boat to the opposite shore. The boat steers in the water the same as on land

Sea jeeps. The Army's most flexible new machine of the war, a Ford-bui...

Picryl description: Public domain image of an automobile, 1940s car, free to use, no copyright restrictions.

Production. B-25 bombers. New B-25 bombers lined up for final inspection and tests at the flying field of a Western Aircraft plant. General Doolittle, who flew in a B-25 in the raid on Tokyo, has called this ship the best military plane in existence. It performs brilliantly at its 25,000-foot ceiling. Fairfax bomber plant, Kansas City

Production. B-25 bombers. New B-25 bombers lined up for final inspecti...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

Production. Airplane engines. All the parts of an airplane engine, which has just undergone severe tests in a Midwest plant, are spread out for minute inspection. After the checkup, the engine will be reassembled and sent on for final inspection. Continental Motors, Michigan

Production. Airplane engines. All the parts of an airplane engine, whi...

Picryl description: Public domain image of food, dinner, grocery store, eating, 1930s, mid-20th-century United States, free to use, no copyright restrictions.

Production. B-17F heavy bombers. A completed B-17F heavy bomber is checked by final inspectors at the Long Beach, California, plant of Douglas Aircraft Company, before it moves to the flight line for rigid acceptance tests. Better known as the "Flying Fortress," the B-17F is a later model of the B-17, which distinguished itself in action in the South Pacific, over Germany and elsewhere. It is a long range, high altitude, heavy bomber with a crew of seven to nine men and with armament sufficient to defend itself on daylight missions

Production. B-17F heavy bombers. A completed B-17F heavy bomber is che...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

Taos County, New Mexico. Science class making soil tests in Penasco High School

Taos County, New Mexico. Science class making soil tests in Penasco Hi...

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS. FLIGHTS OF PLANE

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS....

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS. THE PLANE WITH RUFUS R. BERMANN, WIRELESS OPERATOR, AND FRED AUBERT

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS....

Picryl description: Public domain image of an aircraft, aviator, 1910s-1920s, early 20th-century aviation, free to use, no copyright restrictions.

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS. TESTS

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS....

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

CURTISS AIRPLANE TESTS AND DEMONSTRATIONS; TWIN ENGINE BIPLANE, POTOMAC PARK

CURTISS AIRPLANE TESTS AND DEMONSTRATIONS; TWIN ENGINE BIPLANE, POTOMA...

Picryl description: Public domain image of a biplane aircraft, pilot, aviator, free to use, no copyright restrictions.

MARINE CORPS RIFLE RANGE, LEWIS MACHINE GUN TESTS

MARINE CORPS RIFLE RANGE, LEWIS MACHINE GUN TESTS

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

ARMY, U.S. MACHINE GUN TESTS - Glass negative photogrpah. Public domain.

ARMY, U.S. MACHINE GUN TESTS - Glass negative photogrpah. Public domai...

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

New aviation safety test made. Tests conducted by the Bureau of Standards have indicated than an aviator may exert a pull of approximately 1,000 pounds on his safety belt without breaking it. The photograph shows M.M. Kiley of the Bureau standing beside the machine used in stretching the belts still they were broken

New aviation safety test made. Tests conducted by the Bureau of Standa...

Public domain photograph of people in office, interior, the 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

Find syphilis Help employees get blood tests.

Find syphilis Help employees get blood tests.

Poster promoting employer-sponsored blood tests for the detection of syphilis, showing a doctor drawing blood from a worker in an industrial setting. Work Projects Administration Poster Collection (Library of C... More

Country agent tests a plot of hybrid corn for yield. Grundy County, Iowa

Country agent tests a plot of hybrid corn for yield. Grundy County, Io...

Picryl description: Public domain image of field, irrigation, agriculture, water, free to use, no copyright restrictions.

Antiaircraft gun carriage. A worker tests the smooth working precision of the elevating mechanism assembly of a thirty-seven-millimeter anti-aircraft gun carriage. Planes of 300 miles an hour and better present a fast-moving target which requires precision operation in the anti-aircraft gun that must follow their flight to protect America's lives and property. War program production scene in a Pennsylvania heavy industry plant. AETNA. Ellwood City, Pennsylvania

Antiaircraft gun carriage. A worker tests the smooth working precision...

Picryl description: Public domain image of an industrial building interior, power generator, furnace, boiler, 20th-century architecture, free to use, no copyright restrictions.

A black and white photo of a man working on a machine. Office of War Information Photograph

A black and white photo of a man working on a machine. Office of War I...

Actual size of negative is C (approximately 4 x 5 inches). Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944... More

Production. Airplane manufacture, general. Preparing an experimental scale model of the B-25 bomber for the wind tunnel tests in the Inglewood, California, plant of North American Aviation, Incorporated. The model maker is adjusting the empennage to its correct position. This plant produces the battle-tested B-25 ("Billy Mitchell") bomber, used in General Doolittle's raid on Tokyo and the P-51 ("Mustang") fighter plane, which was first brought into prominence by the British raid on Dieppe

Production. Airplane manufacture, general. Preparing an experimental ...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

Albany, California. At the Department of Agriculture regional research laboratory a worker is taking a sample of chopped blanched cabbage. Before dehydration, vegetables are processed various ways, a quick steam bath is one of these ways. By laboratory tests it is determined which processing method retains the greatest percentage of vitamin content and produces the most attractive product

Albany, California. At the Department of Agriculture regional research...

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

Production. Lockheed P-38 pursuit planes. An armorer in a large Western aircraft plant tests machine gun controls in the partly-finished nose section of a new Lockheed P-38 pursuit plane. This section is now ready for the operation of "mating" it to the center section. The ship will travel down the main assembly line to receive engines, wings, landing gear and other essential equipment

Production. Lockheed P-38 pursuit planes. An armorer in a large Wester...

Public domain photograph of 1930s-1940s US industrial development, Second World War, US war production, indusry, no copyright restrictions image - Picryl description

Women in industry. Gas mask production. She used to wrap bread in a bakery, before Pearl Harbor, but today twenty-one-year-old Eugenia Bireta is a qualified government inspector who tests gas masks for "eye leakage" on this pressure gauge. She's one of many young women employed by a large Midwest vacuum cleaner company now converted to production of gas masks. Eureka Vacuum, Detroit, Michigan

Women in industry. Gas mask production. She used to wrap bread in a ba...

Picryl description: Public domain image of a woman working, women labor, 1940s, economic conditions, home front, world war two, free to use, no copyright restrictions.

Penasco, New Mexico. Science class in the high school making soil tests

Penasco, New Mexico. Science class in the high school making soil test...

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

CURTISS AIRPLANE. TESTS OF CURTISS PLANE FOR ARMY. SECRETARY OF WAR DICKINSON AND GEN. WOOD

CURTISS AIRPLANE. TESTS OF CURTISS PLANE FOR ARMY. SECRETARY OF WAR DI...

A couple of men standing next to each other. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Uncle Sam seeking way to improve theaters for talkies. How to improve theaters for talking motion pictures is a problem now being tackled by the Bureau of Standards. V.L. Chrisler of the Sound Section, who looks like he is imprisoned in stocks, is really studying the "echo effect" in this room and his body and the observing instruments are enclosed so as not to interfere with the tests. It has been found that cushioned seats in talking picture theaters aid in the absorption of the "echo effect"

Uncle Sam seeking way to improve theaters for talkies. How to improve ...

Public domain photograph of cabinet, bureau, office, 1920s - 1930s America, free to use, no copyright restrictions image - Picryl description

Observing work of the busy bee. E.L. Sechrist, associate agriculturist of the bee culture laboratory, U.S. Department of Agriculture, makes tests of how much work the bees accomplish under different weather conditions be checking the weight of the colonies. During a good honey flow under favorable weather conditions, a colony increases in weight as much as 20 pounds in a single day, 1/20/30

Observing work of the busy bee. E.L. Sechrist, associate agriculturist...

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

Government experts discover "perpetual" electrical current. Washington, D.C., March 10. Dr. F.B. Silsbee (left) and Dr. F.G. Brickwedge, of the Bureau of Standards, have just concluded experiments which have proved that an electric current, cut off from its original source, will flow eternally round and round a coiled tin wire circuit when the wire is subjected to 450-degree-below-zero temperature. The tests were made in a new effort to understand what electricity really is, 3/10/38

Government experts discover "perpetual" electrical current. Washington...

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

At several stages during their manufacture, the engines are subjected to exacting tests. Here a skilled machinist is inspecting the main and connecting rod bearings of an engine that has been run on the test block, then dismantled to determine the amount of stress and wear it has suffered. Packard marine engine plant, Detroit

At several stages during their manufacture, the engines are subjected ...

Public domain photograph of factory building, free to use, no copyright restrictions image - Picryl description

Production. Airplane engines. Airplane engines assembled for testing in a Midwest plant. After the tests have been run, the engines will be torn down and all parts minutely inspected. After reassembly and another series of tests, the engines will be shipped to airplane factories. Continental Motors, Muskegon

Production. Airplane engines. Airplane engines assembled for testing i...

Picryl description: Public domain image of an industrial building, factory, workshop, workers, 19th-20th century, free to use, no copyright restrictions.

Production. B-25 bombers. New B-25 bombers lined up for final inspection and tests at the flying field of a Western Aircraft plant. General Doolittle, who flew in a B-25 in the raid on Tokyo, has called this ship the best military plane in existence. It performs brilliantly at its 25,000-foot ceiling. Fairfax bomber plant, Kansas City

Production. B-25 bombers. New B-25 bombers lined up for final inspecti...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

Dr. G.I. Jones, associate chemist, conducts tests in determination of vitamin B complex in dehydrated vegetables. Regional agricultural research laboratory, Albany, California. This test must be conducted in light of certain quality which will not destroy vitamins in solution

Dr. G.I. Jones, associate chemist, conducts tests in determination of ...

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

Proctor and Gamble Distributing Company, Cincinnati, Ohio. Tests being taken during the glycerine filtering process

Proctor and Gamble Distributing Company, Cincinnati, Ohio. Tests being...

Public domain photograph of the United States military and military-industrial complex before World War Two, 1930s, free to use, no copyright restrictions image - Picryl description

Schenectady, New York. Check tests at the Onieda School show physical growth

Schenectady, New York. Check tests at the Onieda School show physical ...

Public domain photograph of New York in 1930s, free to use, no copyright restrictions image - Picryl description

Ignition tests - Glass negative photogrpah. Public domain.

Ignition tests - Glass negative photogrpah. Public domain.

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS. THE PLANE

JANNUS, ANTHONY. FLIGHTS AND TESTS OF REX SMITH PLANE FLOWN BY JANNUS....

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

CURTISS AIRPLANE. TESTS AND DEMONSTRATIONS; TWIN ENGINE BIPLANE, POTOMAC PARK

CURTISS AIRPLANE. TESTS AND DEMONSTRATIONS; TWIN ENGINE BIPLANE, POTOM...

Picryl description: Public domain image of a biplane aircraft, pilot, aviator, free to use, no copyright restrictions.

MARINE CORPS RIFLE RANGE, LEWIS MACHINE GUN TESTS

MARINE CORPS RIFLE RANGE, LEWIS MACHINE GUN TESTS

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

ARMY, U.S. MACHINE GUN TESTS - Glass negative photogrpah. Public domain.

ARMY, U.S. MACHINE GUN TESTS - Glass negative photogrpah. Public domai...

Public domain photograph of a crowd, event, meeting, demonstration, free to use, no copyright restrictions image - Picryl description

ARMY, U.S. MACHINE GUN TESTS - Public domain demonstration photograph

ARMY, U.S. MACHINE GUN TESTS - Public domain demonstration photograph

A black and white photo of a group of people. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

ARMY, U.S. MACHINE GUN TESTS - Public domain portrait photograph

ARMY, U.S. MACHINE GUN TESTS - Public domain portrait photograph

A group of men standing next to each other. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

National Archives. Washington, D.C., Nov. 22. In the powerful press, the sheets of acetate, under heat and pressure 'melt' into the pores of the paper and adhere to each other as well. One additional advantage of this process is that, after being pressed with the sheets of cellulose acetate, the paper is thinner and takes up less room than it did originally. The result is a sheet of paper and acetate which comes off the polished metal plates as a single sheet. Tests for the aging of this material made by the Bureau of Standards in Washington have shown that this treatment of the paper, called laminating is as permanent as it is possible to make any record of paper

National Archives. Washington, D.C., Nov. 22. In the powerful press, t...

Public domain photograph, 1910s-1920s portrait, American, free to use, no copyright restrictions image - Picryl description

Wind tunnel tests aircraft design. S.D. West of the aerodynamics section of the Bureau of Standards demonstrates the "wind tunnel" for testing aircraft design. Most airplanes submitted to the Department of Commerce for approval employ standard types of controls. To ascertain whether the safety of planes can be increased by small modifications of the controls, the Bureau makes studies of the performance of small airplane models in the "wind tunnel," 1/31

Wind tunnel tests aircraft design. S.D. West of the aerodynamics secti...

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

Control laboratory. Shown here are the distillation units in the control laboratory where various tests are made in the production of butadiene

Control laboratory. Shown here are the distillation units in the contr...

Picryl description: Public domain image of a factory worker, plant, manufacture, assembly line, industrial facility, early 20th-century industrial architecture, free to use, no copyright restrictions. show less

Uncle Sam test brass alloys. Washington D.C. To determine the correct amount of alloys necessary for desired results in the making of castings and other uses, the U.S. Bureau of Standards is conducting daily tests. 600 different portions of the alloy are used at the present time. The tests are made with brass bars which are melted in a high frequency induction furnace and the temperatures are recorded before and during the pouring into the molds. In the photograph, left to right: H.V. Gardner, Lemuel D. Jones, and C.N. Saeger, Chief of the Experimental Foundry at the Bureau

Uncle Sam test brass alloys. Washington D.C. To determine the correct ...

Two men in a factory working on a machine, Library of Congress Harris and Ewing collection Title from unverified data on the negative or negative sleeve. Gift; Harris & Ewing, Inc. 1955. General information ab... More

Vice-President of her local, United Electrical Radio and Machine Workers of America, Congress of Industrial Organization (CIO), Mary achieved the job of forelady by working as a hand at many varied operations. She has made a suggestion to conserve bakelite lamp bases, formerly discarded (a suggestion now in use at the plant), and is also the inventor of an apparatus which prevents short-circuiting during tests of lamps. Mary Petillo, forelady of a Newark, New Jersey factory making lamp bulbs and tubes for the Signal Corps, is an active member of her plant's Labor-Management drive to speed victory. She was elected from a plant personnel of 1700, 350 of them men

Vice-President of her local, United Electrical Radio and Machine Worke...

Picryl description: Public domain image of a political campaign, politician, meeting, 1930s, mid-20th-century United States, free to use, no copyright restrictions.

Washington, DC. Preparing the defense bond sales photomural, to be installed in the Grand Central terminal, New York, in the photographic laboratory of the Farm Security Administration. First tests for photographic quality of enlargements

Washington, DC. Preparing the defense bond sales photomural, to be ins...

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

Production. Airplane manufacture, general. Model makers prepare accurately sealed minatures of planes built at the Inglewood, California, plant of North American Aviation, Incorporated. Here an experimental model of the P-51 ("Mustang") is being finished for wind tunnel and other tests. This plant produces the battle-tested B-25 ("Billy Mitchell") bomber, used in General Doolittle's raid on Tokyo, and the P-51 ("Mustang") fighter plane, which was first brought into prominence by the British raid on Dieppe

Production. Airplane manufacture, general. Model makers prepare accur...

Public domain photograph of California in 1930s, free to use, no copyright restrictions image - Picryl description

Production. B-17 heavy bomber. The bombardier's compartment in the nose of a new B-17F (Flying Fortress) bomber shows up clearly, as the huge warship of the air awaits it flight tests at Boeing's Seattle plant. The Flying Fortress has performed with great credit in the South Pacific, over Germany and elsewhere. It is a four-engine heavy bomber capable of flying at high altitudes

Production. B-17 heavy bomber. The bombardier's compartment in the nos...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

Production. B-17 heavy bomber. An Army sentry guards new B-17F (Flying Fortress) bombers at the airfield of Boeing's Seattle plant. The ship will be delivered to the Army and the Navy after they have successfully undergone flight tests. The Flying Fortress has performed with great credit in the South Pacific, over Germany and elsewhere. It is a four-engine heavy bomber capable of flying at high altitudes

Production. B-17 heavy bomber. An Army sentry guards new B-17F (Flying...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

CURTISS AIRPLANE TESTS AND DEMONSTRATIONS; TWIN ENGINE BIPLANE, POTOMAC PARK

CURTISS AIRPLANE TESTS AND DEMONSTRATIONS; TWIN ENGINE BIPLANE, POTOMA...

Picryl description: Public domain image of a biplane aircraft, pilot, aviator, free to use, no copyright restrictions.

In spotlight at House Aircraft Hearing. Rear Admiral Shoemaker, Chief of the Bureau of Navigation, U.S. Navy as he appeared before the House Special Aircraft Committee on February, 14th. Admiral Shoemaker absolutely denied the charges that he "bluepenciled" a statement to be issued under General Pershing's signature, in order to give the American public an erroneous idea of the air bombing tests held off the coasts some months ago against former German battleships

In spotlight at House Aircraft Hearing. Rear Admiral Shoemaker, Chief ...

A black and white photo of a man sitting at a table. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Studying why fruits taste that way. E.K. Nelson of the Department of Agriculture is shown making tests with an apparatus which the Department imported from Germany for the purpose of studying the essential oils or "flavor-giving" content of fruits and vegetables. At present chemists are acquainted with the essential oils of only a few fruits, such as some of the citrus group. The apparatus is a vacuum distill which permits the distillation of liquids at temperatures much lower than usual by reducing the pressure, 1/10/31

Studying why fruits taste that way. E.K. Nelson of the Department of A...

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

Checks railroad signal glasses for government. Washington, D.C., Sept. 29. Red should be read and orange should be orange and never should the colors in railroad signal glasses be so near alike as to confuse a trainman. The Government, through Mrs. Geraldine W. Haupt, Color Expert of the National Bureau of Standards, tests all railroad signal glasses to determine if the color value is true and also to see that they conform to certain specifications. 9/29/37

Checks railroad signal glasses for government. Washington, D.C., Sept....

A woman sitting at a table working on a machine. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Bureau of Standards designs mechanical batter to determine liveliness of baseballs. Washington, D.C., Feb. 21. Using a newly designed apparatus, the U.S. Bureau of Standards today began experiments to determine the relative home-run qualities of American, National and International baseballs. In conducting the tests a scientist pulls the trigger of an air gun loaded with a wooden projectile representing the slugger's bat. The projectile strikes a baseball causing it to fly toward a ballistic pendulum. After each of such hits the scientist takes a reading on the pendulum. It tells him how hard the ball hit the pendulum, or whether it was a homerun, a double, [...]st a pop fly. Dr. H.L. Dryden, Chief [...]e Division of Mechanics and Sound, Designed the machine and is supervising the tests. He is [...] right while on the left is Edward B. Eynon, Secretary of the Washington Baseball Club, 2/21/38

Bureau of Standards designs mechanical batter to determine liveliness ...

Two men working on a machine in a factory. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

A few of sample packages of dehydrated vegetables on which tests are being conducted. Regional agricultural research laboratory, Albany, California

A few of sample packages of dehydrated vegetables on which tests are b...

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

Production. Airplane manufacture, general. Model makers prepare accurately sealed minatures of planes built at the Inglewood, California, plant of North American Aviation, Incorporated. Here an experimental model of the P-51 ("Mustang") is being finished for wind tunnel and other tests. This plant produces the battle-tested B-25 ("Billy Mitchell") bomber, used in General Doolittle's raid on Tokyo, and the P-51 ("Mustang") fighter plane, which was first brought into prominence by the British raid on Dieppe

Production. Airplane manufacture, general. Model makers prepare accur...

Public domain photograph of California in 1930s, free to use, no copyright restrictions image - Picryl description

Production. Aircraft. An engineer in the laboratory of a large Western aircraft plant tests a standard Army weld sample. At irregular intervals every welder working on Army contract material must make the "tee" weld shown here. This sample has failed, as part of the break has occurred in the weld rather than in the parent material. The welder must now produce a satisfactory weld sample before he can again work on Army aircraft material

Production. Aircraft. An engineer in the laboratory of a large Western...

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

Production. Airplane propellers. Arthur Voss performs final blade balancing tests on a Hamilton airplane propeller at a Hartford, Connecticut, plant. This propeller, which will help to power one of our new warplanes, must be balanced and adjusted to the utmost detail to fit it for the important duty it must perform

Production. Airplane propellers. Arthur Voss performs final blade bala...

Picryl description: Public domain photograph of a worker, construction, carpenter, 1930s, free to use, no copyright restrictions.

Production. B-25 bombers. New B-25 bombers lined up for final inspection and tests at the flying field of a Western Aircraft plant. General Doolittle, who flew in a B-25 in the raid on Tokyo, has called this ship the best military plane in existence. It performs brilliantly at its 25,000-foot ceiling. Fairfax bomber plant, Kansas City

Production. B-25 bombers. New B-25 bombers lined up for final inspecti...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

Vernon County, Wisconsin. Saugstad and son Teddy watching the soil tester at work. Frequent tests of this kind maintain soil fertility

Vernon County, Wisconsin. Saugstad and son Teddy watching the soil tes...

Picryl description: Public domain image of working farmers, agriculture, farm, 20th century, free to use, no copyright restrictions.

Schenectady, New York. Check tests at the Onieda School show the physical growth of the students during the school year

Schenectady, New York. Check tests at the Onieda School show the physi...

Public domain photograph of New York in 1930s, free to use, no copyright restrictions image - Picryl description

CURTISS AIRPLANE. TESTS OF CURTISS PLANE FOR ARMY. GENERAL VIEWS

CURTISS AIRPLANE. TESTS OF CURTISS PLANE FOR ARMY. GENERAL VIEWS

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

ARMY, U.S. MACHINE GUN TESTS - Glass negative photogrpah. Public domain.

ARMY, U.S. MACHINE GUN TESTS - Glass negative photogrpah. Public domai...

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

Boston Herald article, February 1, 1925 Saw the ectoplasm issue from Margery during psychic tests

Boston Herald article, February 1, 1925 Saw the ectoplasm issue from M...

Public domain scan of the book page, free to use, no copyright restrictions image - Picryl description

Previous

of 3

Next