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The latest in electric baseball scoreboards. George Coleman, inventor of Wash., is shown with the mechanism of the new scoreboard

The latest in electric baseball scoreboards. George Coleman, inventor ...

A man standing in front of a wall of wine bottles. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

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.

Antiaircraft gun carriage workers. Workers assembling the elevating mechanism of one of America's many new thirty-seven-millimeter antiaircraft gun carriages. These guns will soon take their place in the protection of our soil against the best-armoured and the fastest-flying planes that our enemies can produce. Scene in a Pennsylvania engineering plant now converted almost entirely to America's war program production. AETNA. Ellwood City, Pennsylvania

Antiaircraft gun carriage workers. Workers assembling the elevating me...

Picryl description: Public domain image of an artillery gun, cannon, weapon, free to use, no copyright restrictions.

War alarm clocks. 1,700,000 of them will be produced this year to meet demand that was normally 12,000,000. Will be distributed by all pre-war alarm clock manufacturers. War alarms are of the hand-wound type, not nearly as durable as pre-war models. The case, about 6 x 6 x 2 1/2 inches, is of molded pressed wood and paper pulp. Mechanism contains only about 1/10 ounce brass and 6 1/2 ounce of steel, compared to pre-war average use in the low-priced alarm clocks of 6 and 13 ounces respectively. For this reason, and since the programmed supply for the year will barely cover the needs of workers in directly war-essential occupations, War Production Board (WPB) has requested that no one buy a war alarm unless it satisfies real need, not merely want, wish, or whim

War alarm clocks. 1,700,000 of them will be produced this year to meet...

Public domain photograph related to Great Depression, free to use, no copyright restrictions image - Picryl description

Hanna furnaces of the Great Lakes Steel Corporation. Detroit, Michigan. General view showing the steel framework on which mechanism for unloading boats is mounted

Hanna furnaces of the Great Lakes Steel Corporation. Detroit, Michigan...

Public domain photograph of 1930s-1940s industrial development, no copyright restrictions image - Picryl description

Women in industry. Aircraft motor workers. Using a small rotary air grinder, this young employee of a Midwest aircraft motor plant performs a delicate job on a gear spacer that will see duty in the mechanism of one of America's battleships of the air

Women in industry. Aircraft motor workers. Using a small rotary air gr...

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.

Close-up showing tooth cutting mechanism at work

Close-up showing tooth cutting mechanism at work

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

Training. Work Projects Administration (WPA) vocational school. The complicated mechanism of an airplane engine will be no mystery to these District of Columbia students when they finish their WPA vocational training course in airplane mechanics. Upon completion of training, they will be qualified for jobs in some phase of the construction or maintenance of the United Nation's air armada

Training. Work Projects Administration (WPA) vocational school. The co...

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

[Submarine ("Submarine Vessel, Submarine Bombs and Mode of Attack") for the United States government. Vessel sighting mechanism details]

[Submarine ("Submarine Vessel, Submarine Bombs and Mode of Attack") fo...

Published in: Eyes of the nation : a visual history of the United States / Vincent Virga and curators of the Library of Congress ; historical commentary by Alan Brinkley. New York : Knopf, 1997. Exhibited: Jeff... More

Gate mechanism at Sault Ste. Marie locks

Gate mechanism at Sault Ste. Marie locks

Public domain photograph - historical image of Michigan, United States, free to use, no copyright restrictions image - Picryl description

This giant "potato" was supposed to open and reveal an elaborate girls band. The mechanism kept getting stuck. Presque Isle, Maine

This giant "potato" was supposed to open and reveal an elaborate girls...

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

Production. Diesel engines. The valve mechanism of a diesel engine for the Navy is adjusted at a Midwest manufacturing plant

Production. Diesel engines. The valve mechanism of a diesel engine for...

Picryl description: Public domain image of a worker, labor, factory, plant, manufacture, industrial facility, 1930s, mid-20th-century industrial photo, free to use, no copyright restrictions.

Production. Airplane manufacture, general. This woman employee of North American Aviation's Inglewood, California, plant, assembles the wing flap mechanism for a B-25 bomber. 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. This woman employee of Nort...

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

Conversion. Merry-go-round plant. These hands used to turn out merry-go-rounds to gladden the hearts of the nation's children. The carrousel plant in which they work is now engaged in producing war parts on subcontracts from army and navy contractors. Above is a completed shell ejector getting its final testing. The brass bottom of a navy shell is applied on the testing stand, with the spring mechanism which actually ejects the shell getting the primary test. Spillman Engineering Company, North Tonawanda, New York

Conversion. Merry-go-round plant. These hands used to turn out merry-g...

Picryl description: Public domain image of a worker, labor, factory, plant, manufacture, industrial facility, 1930s, mid-20th-century industrial photo, free to use, no copyright restrictions.

Inspectors instructed. Student inspectors learn the ins and outs of their trade at an eastern arsenal. The mechanism under discussion is that of a 37 mm gun anti-aircraft carriage, M-3, one of the army being turned out for war work

Inspectors instructed. Student inspectors learn the ins and outs of th...

Public domain photograph of 1930s-1940s industrial development, no copyright restrictions image - Picryl description

Conversion. Automobile plant. Assembling oil distribution pipes to back shaft, flywheel, and clutch mechanism bearings of a huge 90T96 Cleveland press being relocated to perform a major operation on hood panels for 4 x 4 army trucks. The 120-ton machine was moved piece by piece from another plant that is being completely dismantled for conversion to other war production. Chevrolet Motors, Detroit, Michigan

Conversion. Automobile plant. Assembling oil distribution pipes to bac...

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

Pittsburgh, Pennsylvania. Lower bracket of the 30,000 kilowatt waterwheel generator which Westinghouse Electric Company is manufacturing for the Watts Bar Dam of the Tennessee Valley Authority (TVA), from underneath, showing hole through which the shaft is passed. The bracket supports the thrust bearing on which rests the entire rotating mechanism of the generator. It has eight arms which bear the brunt of the generator's weight. The bracket weighs 107,500 pounds

Pittsburgh, Pennsylvania. Lower bracket of the 30,000 kilowatt waterwh...

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

This giant "potato" was supposed to open and reveal an elaborate girls band. The mechanism kept getting stuck. Presque Isle, Maine

This giant "potato" was supposed to open and reveal an elaborate girls...

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

Antiaircraft gun carriage. Assembling the elevating mechanism of a thirty-seven-millimeter antiaircraft gun carriage. This and other control mechanisms of an anti-aircraft gun mounting must operate as easily as your automobile controls so that the gunner may stay trained on his swiftly moving target. War program production scene in a Pennsylvania heavy industry plant. AETNA. Ellwood CIty, Pennsylvania

Antiaircraft gun carriage. Assembling the elevating mechanism of a thi...

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

Fort Myer, Virginia. A sergeant at Fort Myer, Virginia demonstrates a "walkie-talkie" in the field. This is the latest and most compact two-way radio in use by the Army. The unit is complete, containing batteries, mechanism, and aerial which telescopes into the case when not in use for this instrument

Fort Myer, Virginia. A sergeant at Fort Myer, Virginia demonstrates a ...

Picryl description: Public domain image of military training, armed forces fort, camp, exercise activity, free to use, no copyright restrictions.

Antiaircraft gun carriage. The elevating mechanism is assembled on a thirty-seven-millimeter antiaircraft gun carriage nearing completion. Care and precision is the watchword in the assembling of these mechanisms. A 300-mile-per-hour target requires a precision instrument to allow the gunner to stay with it. War program production scene in one of Pennsylvania's heavy industry plants now converted to the production of vitally needed military equipment. AETNA. Ellwood City, Pennsylvania

Antiaircraft gun carriage. The elevating mechanism is assembled on a t...

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 propellers. Arthur Voss checks angles and makes final dimensional inspections of a propeller blade for an American warplane at the Hartford, Connecticut, plant. This blade will later be mounted with others in a hydromatic mechanism that will permit adjustment of pitch while planes are in action

Production. Airplane propellers. Arthur Voss checks angles and makes f...

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

Freight train operations on the Chicago an Northwestern Railroad between Chicago and Clinton, Iowa. In the engineer's cab, after the train has arrived at Clinton and the engine is being taken over to the roundhouse. Note that the key has been put back into the automatic train control mechanism

Freight train operations on the Chicago an Northwestern Railroad betwe...

Picryl description: Public domain image of workers, labor, 1940s, economic conditions, free to use, no copyright restrictions.

Shopton, near Fort Madison, Iowa. Train control mechanism installed on a truck wheel of an engine in the Atchison, Topeka and Santa Fe Railway roundhouse

Shopton, near Fort Madison, Iowa. Train control mechanism installed on...

Picryl description: Public domain image of railroad tracks, train car, railway, free to use, no copyright restrictions.

School of mechanism - Public domain American sheet music, 1880

School of mechanism - Public domain American sheet music, 1880

From: Music Copyright Deposits, 1870-1885 (Microfilm M 3500) Also available through the Library of Congress Web Site as facsimile page images. (additional physical form)

Infantryman with halftrack, a young soldier of the armed forces, holds and sights his Garand rifle like an old timer, Fort Knox, Ky. He likes the piece for its fine firing qualities and its rugged, dependable mechanism.

Infantryman with halftrack, a young soldier of the armed forces, holds...

Picryl description: Public domain image of military vehicle, tank, artillery, free to use, no copyright restrictions.

A young woman employee of North American Aviation, Incorporated, working over the landing gear mechanism of a P-51 fighter plane, Inglewood, Calif. The mechanism resembles a small cannon

A young woman employee of North American Aviation, Incorporated, worki...

Picryl description: Public domain historical photo of Second World War, free to use, no copyright restrictions image.

Antiaircraft gun carriage. Assembling the foot firing mechanism on a thirty-seven-millimeter antiaircraft gun carriage. The gunner requires both hands to follow his swiftly moving target, and must get in as many shots as he can while the target is still within range. War program production scene in a Pennsylvania heavy industry plant. AETNA. Ellwood CIty, Pennsylvania

Antiaircraft gun carriage. Assembling the foot firing mechanism on a t...

Picryl description: Public domain image of a worker, labor, factory, plant, manufacture, industrial facility, 1930s, mid-20th-century industrial photo, free to use, no copyright restrictions.

On the "assembly" line. Scores of parts go into Uncle Sam's big guns. Worker at a large eastern arsenal inspects some of the mechanism parts for medium-caliber guns. The utmost accuracy is required to ensure efficient performance

On the "assembly" line. Scores of parts go into Uncle Sam's big guns. ...

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

Production. Airplane propellers. Three-way spider forgings for the hydraulic mechanism that adjust propeller blade pitch await precision machining at a Hartford, Connecticut, plant. This plant produces great numbers of variable pitch propellers with two-, three- and four-blade propellers

Production. Airplane propellers. Three-way spider forgings for the hyd...

Public domain photograph - historical image of Connecticut, United States, free to use, no copyright restrictions image - Picryl description

Fort Knox. Garand rifle. A young soldier of the armored forces, in training at Fort Knox, Kentucky, holds and sights his Garand rifle like an old timer. He likes the piece for its fine firing qualities and its rugged, dependable mechanism

Fort Knox. Garand rifle. A young soldier of the armored forces, in tra...

Picryl description: Public domain image of a military person with a firearm, machine gun, free to use, no copyright restrictions.

"Big Tex," a 52-foot-tall, metal-and-fabric talking cowboy who welcomed visitors to the Texas State Fair for 60 years, photographed in 2012, approximately one month before he was destroyed in a fire following an apparent electrical short-circuit in the mechanism that enabled the icon's mouth to move. Dallas, Texas

"Big Tex," a 52-foot-tall, metal-and-fabric talking cowboy who welcome...

Title, date, subject note, and keywords based on information provided by the photographer. Tex's voice was created by a live human, observing from a nearby trailer. Big Tex began as a Santa Claus the world's ... More

Denouncing the present war-declaring mechanism as 'autocratic,' Rep. Louis Ludlow appealed for approval of a constitutional amendment requiring a Nat'l referendum on participation in a foreign war

Denouncing the present war-declaring mechanism as 'autocratic,' Rep. L...

Picryl description: Public domain historical photo of Washington DC during the First World War, free to use, no copyright restrictions image.

A young woman employee of North American Aviation, Incorporated, working over the landing gear mechanism of a P-51 fighter plane, Inglewood, Calif. The mechanism resembles a small cannon

A young woman employee of North American Aviation, Incorporated, worki...

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

Conversion. Automobile plant. A back shaft that holds the flywheel and clutch mechanism of a 90T96 Cleveland press awaits assembly into the big 120-ton machine. This press will perform a major operation on hood panels for 4 x 4 army trucks. It was moved piece by piece for another plant that is being completely dismantled for conversion to other war production. Chevrolet Motors, Detroit, Michigan

Conversion. Automobile plant. A back shaft that holds the flywheel and...

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

Fort Knox. Garand rifle. A young soldier of the armored forces, in training at Fort Knox, Kentucky, holds and sights his Garand rifle like an old timer. He likes the piece for its fine firing qualities and its rugged, dependable mechanism

Fort Knox. Garand rifle. A young soldier of the armored forces, in tra...

Picryl description: Public domain image of a soldier, armed forces, infantry, free to use, no copyright restrictions.

Victory Corps, tomorrow's defenders of liberty. Knowledge of the mechanism of an airplane engine is important to the flyer or the mechanic. In Los Angeles, California, Polytechnic High School Victory Corps boys who will be the men to "keep'em flyin" in the future are being given technical training

Victory Corps, tomorrow's defenders of liberty. Knowledge of the mecha...

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

Training. Work Projects Administration (WPA) vocational school. The complicated mechanism of an airplane engine will be no mystery to these District of Columbia students when they finish their WPA vocational training course in airplane mechanics. Upon completion of training, they will be qualified for jobs in some phase of the construction or maintenance of the United Nation's air armada

Training. Work Projects Administration (WPA) vocational school. The co...

Picryl description: Public domain image of workers, labor, 1940s, economic conditions, free to use, no copyright restrictions.

Midshipmen of the U.S. Naval Academy, (Ist year men) being carried by boat to the plane in which they take daily flights and study each and every part of the mechanism. These are the first men to receive this training under the recent orders, providing for a course in aviation

Midshipmen of the U.S. Naval Academy, (Ist year men) being carried by ...

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

Mitchell Field. Business end of a bomber engine. The controllable pitch housing in the propeller hub assembly contains the mechanism that automatically adjusts the set of the three propellers

Mitchell Field. Business end of a bomber engine. The controllable pitc...

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

Conversion. Soft drink dispenser plant. Now converted to production of war essentials, this Eastern plant once manufactured such civilian items as this soft drink dispenser, the precision mechanism of which is undergoing inspection by a designer. It was this type of high grade precision workmanship which enabled the company to obtain specialized precision contracts and subcontracts from the government. Bristol and Martin Company, New York, New York

Conversion. Soft drink dispenser plant. Now converted to production of...

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

A vacuum mechanism for inserting discs is an important unit in the machine setup of a converted cash register factory now producing 20mm fuses in enormous quantities

A vacuum mechanism for inserting discs is an important unit in the mac...

Public domain photograph of indoor, interior activity, America in the 1930s, free to use, no copyright restrictions image - Picryl description

Production. Airplane propellers. Assembled three-way Hamilton propellers ready for shipment, minus power section, from a Hartford, Connecticut, plant. When installed on a warplane, this type of propeller will be fitted with a hydromatic mechanism that varies the blade pitch during flight

Production. Airplane propellers. Assembled three-way Hamilton propelle...

Picryl description: Public domain photograph of workers, war production, aircraft, airfield, the 1930s -1940s, free to use, no copyright restrictions.

Anaconda smelter, Montana. Anaconda Copper Mining Company. Cars containing fifty tons of copper ore are dumped by an unloading mechanism into a 200 ton hopper

Anaconda smelter, Montana. Anaconda Copper Mining Company. Cars contai...

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

Production. Airplane propellers. Two-way spider forgings for Hamilton airplane propellers in the rough store department of a Hartford, Connecticut, plant. After precision machining these spiders will hold a two-blade propeller assembly in the hydromatic mechanism that controls the blade pitch during flight

Production. Airplane propellers. Two-way spider forgings for Hamilton ...

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

"Big Tex," a 52-foot-tall, metal-and-fabric talking cowboy who welcomed visitors to the Texas State Fair for 60 years, photographed in 2012, approximately one month before he was destroyed in a fire following an apparent electrical short-circuit in the mechanism that enabled the icon's mouth to move. Dallas, Texas

"Big Tex," a 52-foot-tall, metal-and-fabric talking cowboy who welcome...

Title, date, subject note, and keywords based on information provided by the photographer. Tex's voice was created by a live human, observing from a nearby trailer. Big Tex began as a Santa Claus the world's ... More

[Paddle wheel mechanism of side-wheel steamer]

[Paddle wheel mechanism of side-wheel steamer]

Drawing is third panel on the "Machinery Scroll", depicting Perry's expedition to Japan in 1853. Watercolor drawing by contemporary Japanese artist.

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Open hearth steel is also made at this plant. Workers here shown are completing the charge to an open hearth furnace which has a capacity of about 100 tons per heat. Only small quantities of materials are charged by hand in this way. The bulk of the material is charged by the mechanism shown in pictures nos. D-995 and D-994

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenri...

Picryl description: Public domain image of industrial or agricultural worker, 1930s, 20th-century, free to use, no copyright restrictions. show less

Fort Knox. Garand rifle. A young soldier of the armored forces, in training at Fort Knox, Kentucky, holds and sights his Garand rifle like an old timer. He likes the piece for its fine firing qualities and its rugged, dependable mechanism

Fort Knox. Garand rifle. A young soldier of the armored forces, in tra...

Picryl description: Public domain image of military vehicle, automobile, tractor truck, free to use, no copyright restrictions.

[Submarine ("Submarine Vessel, Submarine Bombs and Mode of Attack") for the United States government. Vessel sighting mechanism details]

[Submarine ("Submarine Vessel, Submarine Bombs and Mode of Attack") fo...

Published in: Eyes of the nation : a visual history of the United States / Vincent Virga and curators of the Library of Congress ; historical commentary by Alan Brinkley. New York : Knopf, 1997. Exhibited: Jeff... More

School of mechanism - Public domain American sheet music, 1880

School of mechanism - Public domain American sheet music, 1880

From: Music Copyright Deposits, 1870-1885 (Microfilm M 3500) Also available through the Library of Congress Web Site as facsimile page images. (additional physical form)

Edgewood Arsenal, Maryland. Gas demonstration. Attaching electrical detonating mechanism to Livens projectors

Edgewood Arsenal, Maryland. Gas demonstration. Attaching electrical de...

Picryl description: Public domain image of an artillery gun, cannon, weapon, free to use, no copyright restrictions.

Production. Airplane propellers. Propeller blades that will soon be driving American warplanes are stored after final dimensional inspections at a Hartford, Connecticut, plant. The various blades will later be mounted, in sets of two, three, and four in the mechanism that will permit adjustment of pitch while planes are in action

Production. Airplane propellers. Propeller blades that will soon be dr...

Public domain photograph of manufacturing, industry, free to use, no copyright restrictions image - Picryl description

A young soldier of the armored forces holds and sights his Garand rifle like an old timer, Fort Knox, Ky. He likes the piece for its fine firing qualities and its rugged, dependable mechanism. Infantryman with halftrack

A young soldier of the armored forces holds and sights his Garand rifl...

Picryl description: Public domain image of military vehicle, automobile, tractor truck, free to use, no copyright restrictions.

Mitchell Field. The eagle puts foot to earth. An air-crew officer dressed in full combat gear inspects a bomber landing wheel. Part of the retracting mechanism is shown

Mitchell Field. The eagle puts foot to earth. An air-crew officer dres...

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

Production. Airplane propellers. John Sonesen, propeller blade grinder at a Hartford, Connecticut plant, inspects a blade for a vertical balance during the operation of grinding it to correct contours in a template. This blade will be assembled in a hydromatic mechanism to help power one of our new warplanes

Production. Airplane propellers. John Sonesen, propeller blade grinder...

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

Warner Robins, Georgia. Air Service Command, Robins Field. Men of an air depot group studying the mechanism of one of the turrets of a bomber

Warner Robins, Georgia. Air Service Command, Robins Field. Men of an a...

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

Mechanism for pulling lock gate open or closing it

Mechanism for pulling lock gate open or closing it

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

Flame propogation in gas engines photographed. Washington, D.C., Aug. 26. A study of the mechanism of the flame propogation in the cylinder of a internal combustion engine is being made at the U.S. Bureau of Standards for the National Advisory Committee for Aeronautics. A secial bomb made of steel, shown in the foreground, and designed to withstand pressures up to 500 lbs. to the square inch is used to show the progress of the flame and the rise in pressure which may be recorded photographically during the gas explosions under carefully controlled conditions. The camera, where the recordings are made, is in front of Dr. Ernest F. Flock of the Bureau of Standards, carries its film on a drum which may be revolved up to 4,000 revolutions per minute, this camera also records a neon light flashing at a thousandth of a second. The independent effects of pressure, temperature and charge composition upon flame speed and explosion ratio may be made with this equipment, 8/26/37

Flame propogation in gas engines photographed. Washington, D.C., Aug. ...

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

A young soldier of the armored forces holds and sights his Garand rifle like an old timer, Fort Knox, Ky. He likes the piece for its fine firing qualities and its rugged, dependable mechanism. Infantryman with halftrack

A young soldier of the armored forces holds and sights his Garand rifl...

Picryl description: Public domain image of military vehicle, automobile, tractor truck, free to use, no copyright restrictions.

This giant "potato" was supposed to open and reveal an elaborate girls band. The mechanism kept getting stuck. Presque Isle, Maine

This giant "potato" was supposed to open and reveal an elaborate girls...

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

This giant "potato" was supposed to open and reveal an elaborate girls band. The mechanism kept getting stuck. Presque Isle, Maine

This giant "potato" was supposed to open and reveal an elaborate girls...

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

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Open hearth steel is also made at this plant. Raw materials are charged into an open hearth furnace by means of this charging mechanism. The open hearth furnaces have a capacity of about 100 tons of steel per heat

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenri...

Public domain photograph of 1930s-1940s train station, train car, no copyright restrictions image - Picryl description

This landing gear mechanism for a North American P-51 fighter resembles a small cannon

This landing gear mechanism for a North American P-51 fighter resemble...

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

Shopton, near Fort Madison, Iowa. Engines in the Atchison, Topeka and Santa Fe Railway roundhouse. Note train control mechanism on truck wheel of the engine in foreground

Shopton, near Fort Madison, Iowa. Engines in the Atchison, Topeka and ...

Public domain photograph of a steam locomotive, train car, railroad, railway, 19th-20th century, free to use, no copyright restrictions image - Picryl description

Antiaircraft gun carriage. The elevating mechanism is assembled on a thirty-seven-millimeter antiaircraft gun carriage nearing completion. Care and precision is the watchword in the assembling of these mechanisms. A 300-mile-per-hour target requires a precision instrument to allow the gunner to stay with it. War program production scene in one of Pennsylvania's heavy industry plants now converted to the production of vitally needed military equipment. AETNA. Ellwood City, Pennsylvania

Antiaircraft gun carriage. The elevating mechanism is assembled on a t...

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

Mitchell Field. Business end of a bomber engine. The controllable pitch housing in the propeller hub assembly contains the mechanism that automatically adjusts the set of the three propellers

Mitchell Field. Business end of a bomber engine. The controllable pitc...

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

The mechanism of the hand - Public domain American music sheet

The mechanism of the hand - Public domain American music sheet

The mechanism of the hand - Public domain American music sheet

The mechanism of the hand - Public domain American music sheet

School of mechanism - Public domain American sheet music, 1880

School of mechanism - Public domain American sheet music, 1880

From: Music Copyright Deposits, 1870-1885 (Microfilm M 3500) Also available through the Library of Congress Web Site as facsimile page images. (additional physical form)

This giant "potato" was supposed to open and reveal an elaborate girls band. The mechanism kept getting stuck. Presque Isle, Maine

This giant "potato" was supposed to open and reveal an elaborate girls...

Public domain photograph of United States agriculture in the 1930s, country, farmer, farm, great depression, migration, dust bowl refugees, free to use, no copyright restrictions image - Picryl description

A poster comes to life. The men pass the scrap charge for a battery of open-hearth furnaces, piles into small buckets which are emptied into the furnaces by an electrically operated shoveling mechanism. The line of buckets at the left shows what is happening to the auto hubs, axles, and drive shafts which a few months ago were strewn over the countryside in auto graveyards. The bucket-line at the right contains mill waste, which is carefully saved and reused

A poster comes to life. The men pass the scrap charge for a battery of...

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

As a test, three rounds of primers in empty shell cases are fired in each howitzer to check the breech mechanism. The firing is pictured. These seventy-five millimeter pack howitzers are being manufactured at the Erie, Pennsylvania, General Electric plant, largely on machinery formerly used for making streetcar motors

As a test, three rounds of primers in empty shell cases are fired in e...

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

School of mechanism - Public domain American sheet music, 1880

School of mechanism - Public domain American sheet music, 1880

From: Music Copyright Deposits, 1870-1885 (Microfilm M 3500) Also available through the Library of Congress Web Site as facsimile page images. (additional physical form)

The mechanism of the hand - Public domain American music sheet

The mechanism of the hand - Public domain American music sheet

A young woman employee of North American Aviation, Incorporated, working over the landing gear mechanism of a P-51 fighter plane, Inglewood, Calif. The mechanism resembles a small cannon

A young woman employee of North American Aviation, Incorporated, worki...

12002-38. Transfer from U.S. Office of War Information, 1944. General information about the FSA/OWI Color Photographs is available at http://hdl.loc.gov/loc.pnp/pp.fsac Title from FSA or OWI agency caption. Add... More

Fort Madison, Iowa. In the train control room at the Shopton shops of the Atchison, Topeka and Santa Fe Railroad. Testing the governor of a train control mechanism

Fort Madison, Iowa. In the train control room at the Shopton shops of ...

Picryl description: Public domain image of workers, labor, 1940s, economic conditions, free to use, no copyright restrictions.

The mechanism of the hand - Public domain American music sheet

The mechanism of the hand - Public domain American music sheet

School of mechanism - Public domain American sheet music, 1880

School of mechanism - Public domain American sheet music, 1880

From: Music Copyright Deposits, 1870-1885 (Microfilm M 3500) Also available through the Library of Congress Web Site as facsimile page images. (additional physical form)

Mechanism installed especially to speed up the cutting process

Mechanism installed especially to speed up the cutting process

Public domain photograph of 1930s-1940s industrial development, no copyright restrictions image - Picryl description

Fort Knox. Garand rifle. A young soldier of the armored forces, in training at Fort Knox, Kentucky, holds and sights his Garand rifle like an old timer. He likes the piece for its fine firing qualities and its rugged, dependable mechanism

Fort Knox. Garand rifle. A young soldier of the armored forces, in tra...

Picryl description: Public domain image of military vehicle, automobile, tractor truck, free to use, no copyright restrictions.

Mitchell Field. Business end of a bomber engine. The controllable pitch housing in the propeller hub assembly contains the mechanism that automatically adjusts the set of the three propellers

Mitchell Field. Business end of a bomber engine. The controllable pitc...

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

Fort Knox. Garand rifle. A young soldier of the armored forces, in training at Fort Knox, Kentucky, holds and sights his Garand rifle like an old timer. He likes the piece for its fine firing qualities and its rugged, dependable mechanism

Fort Knox. Garand rifle. A young soldier of the armored forces, in tra...

Picryl description: Public domain image of a soldier, armed forces, infantry, free to use, no copyright restrictions.

Production. Airplane propellers. Finished stationary cams for the hydraulic mechanism that adjust the pitch of airplane propeller blades while planes are in action. The Hartford, Connecticut, plant, where they are stored in turning out great numbers of two- three- and four-blade propellers

Production. Airplane propellers. Finished stationary cams for the hydr...

Public domain photograph - historical image of Connecticut, United States, free to use, no copyright restrictions image - Picryl description

The mechanism of the hand - Public domain American music sheet

The mechanism of the hand - Public domain American music sheet

The mechanism of the hand - Public domain American music sheet

The mechanism of the hand - Public domain American music sheet

The mechanism of the hand - Public domain American music sheet

The mechanism of the hand - Public domain American music sheet

The mechanism of the hand - Public domain American music sheet

The mechanism of the hand - Public domain American music sheet

One of the wonders of the age. The first electric street railway in Massachusetts! Have you seen it? If not take a car of the East Middlesex St. Railway Co. and ride to Revere Beach and there connect with the electric road. a marvel of mechanism

One of the wonders of the age. The first electric street railway in Ma...

Transportayion. Available also through the Library of Congress web site in two forms: as facsimile page images and as full text in SGML. Printed Ephemera Collection; Portfolio 77, Folder 14.

Infantryman with halftrack, a young soldier of the armed forces, holds and sights his Garand rifle like an old timer, Fort Knox, Ky. He likes the piece for its fine firing qualities and its rugged, dependable mechanism.

Infantryman with halftrack, a young soldier of the armed forces, holds...

Picryl description: Public domain image of military vehicle, automobile, tractor truck, free to use, no copyright restrictions.

Victory Corps, tomorrow's defenders of liberty. Knowledge of the mechanism of an airplane engine is important to the flyer or the mechanic. In Los Angeles, California, Polytechnic High School Victory Corps boys who will be the men to "keep'em flyin" in the future are being given technical training

Victory Corps, tomorrow's defenders of liberty. Knowledge of the mecha...

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

School of mechanism - Public domain American sheet music, 1880

School of mechanism - Public domain American sheet music, 1880

From: Music Copyright Deposits, 1870-1885 (Microfilm M 3500) Also available through the Library of Congress Web Site as facsimile page images. (additional physical form)

Mechanism Berry airship, St. Louis

Mechanism Berry airship, St. Louis

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

Another view of cutting mechanism in stage two, three reels after start of cutting

Another view of cutting mechanism in stage two, three reels after star...

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

Training. Work Projects Administration (WPA) vocational school. The complicated mechanism of an airplane engine will be no mystery to these District of Columbia students when they finish their WPA vocational training course in airplane mechanics. Upon completion of training, they will be qualified for jobs in some phase of the construction or maintenance of the United Nation's air armada

Training. Work Projects Administration (WPA) vocational school. The co...

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

Production. Airplane propellers. Frank Geary uses an electro-limit gauge at a Hartford, Connecticut, plant to make final inspections of a three-way hydromatic spider that form part of the mechanism which varies the pitch of airplane propeller blades while planes are in action. At this plant propellers are made with combinations of two, three and four blades

Production. Airplane propellers. Frank Geary uses an electro-limit gau...

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

The mechanism of the hand - Public domain American music sheet

The mechanism of the hand - Public domain American music sheet

School of mechanism - Public domain American sheet music, 1880

School of mechanism - Public domain American sheet music, 1880

From: Music Copyright Deposits, 1870-1885 (Microfilm M 3500) Also available through the Library of Congress Web Site as facsimile page images. (additional physical form)

A young woman employee of North American Aviation, Incorporated, working over the landing gear mechanism of a P-51 fighter plane, Inglewood, Calif. The mechanism resembles a small cannon

A young woman employee of North American Aviation, Incorporated, worki...

12002-38. Transfer from U.S. Office of War Information, 1944. General information about the FSA/OWI Color Photographs is available at http://hdl.loc.gov/loc.pnp/pp.fsac Title from FSA or OWI agency caption. Add... More

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenridge, Pennsylvania. Open hearth steel is also made at this plant. Here a worker sits at the controls of the charging mechanism for loading materials and elements into the furnace. This open hearth furnace has a capacity of about 100 tons per heat

Steel alloy manufacture. Allegheny Ludlum Steel Corporation, Brackenri...

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

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