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The suicide, a poorly dressed laborer, had staggered around in a circle nearly ten feet in diameter after gashing his own throat

The suicide, a poorly dressed laborer, had staggered around in a circl...

Public domain photo of drawing, 20th century, free to use, no copyright restrictions image - Picryl description.

Siphon--the world's longest--which carries water five miles to Dead Ox Flat. It is eight feet in diameter. Malheur County, Oregon

Siphon--the world's longest--which carries water five miles to Dead Ox...

Public domain image of an arch structure, bridge, historic place ruins, classical architecture, free to use, no copyright restrictions - Picryl description

Production. Aircraft. A test engineer in a big Western aircraft plant examines a metal sample through a high-power (2700 diameter) microscope. Representative samples of all structural metals purchased for use in building ships in this plant must pass critical tests to detect faulty materials

Production. Aircraft. A test engineer in a big Western aircraft plant ...

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

Conversion. Copper and brass processing. This is an inverted bull clock, a modern piece of equipment in a brass and copper mill for drawing large diameter wire. As the wire leaves the machine, it is automatically coiled for easy handling. Most frequently it is redrawn to smaller diameters, though there are many uses for heavy wire, too. Chase Brass and Copper Company, Euclid, Ohio

Conversion. Copper and brass processing. This is an inverted bull cloc...

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

Conservation. Glass gauges replacing steel. Checking an inside diameter of a cartridge case with one of the glass gauges, which replace steel gauges at the Frankford Arsenal, are produced by acid etching. Glass gauges are lighter and cheaper than steel, permit greater visibility in inspection, are not as much affected by room temperatures and heat of operators' hands, are not corroded by perspiration, need no protection against rusting, do not acquire burrs that would change the effective sizes. They can save the annual use of 250 tons of critical tool steel in government arsenals alone

Conservation. Glass gauges replacing steel. Checking an inside diamete...

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.

The Lick telescope, length 57 feet, diameter of object glass 36 inches, total weight 40 tons / W.J. Morgan & Co. Lith. Cleveland, O.

The Lick telescope, length 57 feet, diameter of object glass 36 inches...

Print shows an interior view of the Lick Observatory with the Lick telescope mounted on a large stand and being manipulated by a man standing on the top level, with a man sitting on a small moveable platform be... More

Str. no. 190, 3 double end boilers, 14' diameter,21'-10" long, Detroit Shipbuilding Co.

Str. no. 190, 3 double end boilers, 14' diameter,21'-10" long, Detroit...

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

Anaconda smelter, Montana. Anaconda Copper Mining Company. Smokestack, which is the largest in the world: 585 feet in height with a diameter at base of seventy-five feet and at top of sixty feet. Flue gases are discharged at the rate of three to four million cubic feet per minute. The arsenic plant is seen at the base of the stack

Anaconda smelter, Montana. Anaconda Copper Mining Company. Smokestack,...

Picryl description: Public domain image of a tower, column, chimney, free to use, no copyright restrictions.

New York, New York. Class in the use of precision instruments, part of the government-sponsored industrial training program at New York University. Most of the students are women. Checking the outside diameter of a cast iron face cam to the nearest thousandth of an inch with a five to six inch micrometer caliper

New York, New York. Class in the use of precision instruments, part of...

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

Calaveras big trees. House over the stump of the original big tree, diameter 32 feet, Mammoth Grove, Calaveras County

Calaveras big trees. House over the stump of the original big tree, di...

Photograph shows a round structure (left) and a ladder leaning against a giant tree stump (right). No. 880.

Largest stump, 10 1/2 ft. diameter. Cedar log beneath stump 5 1/2 ft. diameter

Largest stump, 10 1/2 ft. diameter. Cedar log beneath stump 5 1/2 ft. ...

Lumbering in the Cascade Mountains near Seattle, Wash. Photo copyrighted by Darius Kinsey. No. 67. This record contains unverified, old data from caption card. Caption card tracings: Ind. Lumber Wash. 1902; Tre... More

A cedar tree in Washington, 18 feet in diameter

A cedar tree in Washington, 18 feet in diameter

Photo copyrighted by Darius Kinsey. No. 1762. This record contains unverified, old data from caption card. Caption card tracings: Wash. Cascade Mtns.?; Trees; Logging; Geogr.; Shelf.

Siphon--the world's longest--which carries water five miles to Dead Ox Flat. It is eight feet in diameter. Malheur County, Oregon

Siphon--the world's longest--which carries water five miles to Dead Ox...

Public domain image of an arch structure, bridge, historic place ruins, classical architecture, free to use, no copyright restrictions - Picryl description

Giant tire manufacturer. This husky workman, standing six feet four inches tall, looks small indeed as he uses air pressure to clean the lid of the world's largest vulcanizing unit in an Eastern tire plant. The top section of this mold being prepared to vulcanize a large bullet-sealing gasoline tank, weighs sixteen tons and can also be used to vulcanize tires over ten feet in diameter

Giant tire manufacturer. This husky workman, standing six feet four in...

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

Devil's Tower. With water scene from east side, 1200 high, 800 diameter. Description furnished free

Devil's Tower. With water scene from east side, 1200 high, 800 diamete...

Distant view of Devils Tower in center; pool of water in foreground. Copyright deposit. Title transcribed from item. Forms part of the John C. H. Grabill Collection.

Aluminum. Reynolds Metal Company, Louisville, Kentucky. Rolled "strong alloy" aluminum rod stock as it comes from the rolling mill. This stock has been reduced to 1 3/8" in diameter

Aluminum. Reynolds Metal Company, Louisville, Kentucky. Rolled "strong...

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

An Ohio manufacturer is looking for two and thirteen-sixteenths inch and three and three-sixteenths inch automatic screw machine facilities for the machining of large quantities of steel fuse parts. Item: inner can. Material: cold rolled steel tubing two and thirteen-sixteenths inch diameter by three inches. Tolerances: plus or minus --1. Quantity: five-hundred daily. Machines needed: automatic screw machine two and thirteen-sixteenths inch capacity, drill jig, single spindle tapper. Item: outer can. Material: cold rolled steel tubing three and three-sixteenths inch diameter by eight inches. Tolerances: plus .002 minus .000. Quantity: 500 daily. Machines needed: automatic screw machine, three and three-sixteenths inch capacity, drill jig, tapper, milling machine. A government procurement agency is seeking a contractor with facilities for forging heat treating and machining bulkheads. These parts are twenty-one inches in diamerter by eight inches. Material: steel, alloy CM. Dimensions: twenty-one inches in diameter by eight inches. Tolerances: close. Quantity: 500 to 6000 pieces per month

An Ohio manufacturer is looking for two and thirteen-sixteenths inch a...

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

Giant tire manufacturer. This husky workman, standing six feet four inches tall, looks small indeed as he uses air pressure to clean the lid of the world's largest vulcanizing unit at a large Eastern tire plant. The top section of this mold, now being prepared to vulcanize a large bullet-sealing gasoline tank, weighs sixteen tons and can also be used to vulcanize tires ten feet in diameter

Giant tire manufacturer. This husky workman, standing six feet four in...

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

Conservation. Glass gauges replacing steel. Checking an inside diameter of a cartridge case with one of the glass gauges which replace steel gauges at the Frankford Arsenal. Glass gauges are lighter and cheaper than steel, permit greater visibility in inspection, are not as much affected by room temperatures and heat of operators' hands, are not corroded by perspiration, need no protection against rusting, do not acquire burrs that would change the effective sizes. They can save the annual use of 250 tons of critical tool steel in government arsenals alone

Conservation. Glass gauges replacing steel. Checking an inside diamete...

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

Philadelphia, Pennsylvania. Stator frame of the 30,000 kilowatt generator which Westinghouse Electric Company is manufacturing for the Watts Bar Dam of Tennesse Valley Authority (TVA). It is lined with thousands of armature coils, and over 100,000 sheets of laminated iron which serve to conduct the electricity. The stator frame is part of the generator inside of which revolves the rotor or revolving part. The whole frame weighs 425,000 pounds and is shipped in four quarter sections. A worker measures the resistance of the windings. The frame measures 378 inches in diameter

Philadelphia, Pennsylvania. Stator frame of the 30,000 kilowatt genera...

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

The Great Floral Clock (accurate timekeeper, 100 feet in diameter) in front of the Agricultural Building, Louisiana Purchase Exposition, St. Louis, Mo., U. S. A.

The Great Floral Clock (accurate timekeeper, 100 feet in diameter) in ...

H52539 U.S. Copyright Office. No. 8502. Public domain photograph of building, stereoscopic card, free to use, no copyright restrictions image - Picryl description

Giant wheels ten feet in diameter, once used for carrying logs to sawmill, Michigan

Giant wheels ten feet in diameter, once used for carrying logs to sawm...

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

Siphon--the world's longest--which carries water five miles to Dead Ox Flat. It is eight feet in diameter. Malheur County, Oregon

Siphon--the world's longest--which carries water five miles to Dead Ox...

Public domain image of an arch structure, bridge, historic place ruins, classical architecture, free to use, no copyright restrictions - Picryl description

Production. 155mm shells. Finish turning of the straight diameter and profile of a 155mm shell on a Stamets lathe in a converted auto plant. Willy's, Toledo, Ohio

Production. 155mm shells. Finish turning of the straight diameter and ...

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

Conversion. Copper and brass processing. The inside of a large brass and copper tube mill. Copper tubes are made in many sizes, and in many alloys, and are needed for war production in hundreds of different ways--from small diameter tubing for gas and oil lines in airplanes and tanks and motor cars to large diameter tubes used in construction of our battleships. A tube annealing furnace may be seen to the right. Chase Brass and Copper Company, Euclid, Ohio

Conversion. Copper and brass processing. The inside of a large brass a...

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.

Conservation. Glass gauges replacing steel. Checking an inside diameter of a cartridge case with one of the glass gauges, which replace steel gauges at the Frankford Arsenal, are produced by acid etching. Glass gauges are lighter and cheaper than steel, permit greater visibility in inspection, are not as much affected by room temperatures and heat of operators' hands, are not corroded by perspiration, need no protection against rusting, do not acquire burrs that would change the effective sizes. They can save the annual use of 250 tons of critical tool steel in government arsenals alone

Conservation. Glass gauges replacing steel. Checking an inside diamete...

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

Siphon--the world's longest--which carries water five miles to Dead Ox Flat. It is eight feet in diameter. Malheur County, Oregon

Siphon--the world's longest--which carries water five miles to Dead Ox...

Public domain image of an arch structure, bridge, historic place ruins, classical architecture, free to use, no copyright restrictions - Picryl description

Women in industry. Tool production. Testing small diameter, high-speed twist drills, these women employed by a Midwest drill and tool company roll the drills down a slight incline to determine regularity of diameter. It's a job requiring patience and finger dexterity, and these young women possess those definite feminine propensities for just such work. Republic Drill and Tool Company, Chicago, Illinois

Women in industry. Tool production. Testing small diameter, high-spee...

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.

Anaconda smelter, Montana. Anaconda Copper Mining Company. Smokestack, which is the largest in the world: 585 feet in height with a diameter at base of seventy-five feet and at top of sixty feet. Flue gases are discharged at the rate of three to four million cubic feet per minute. The arsenic plant is seen at the base of the stack

Anaconda smelter, Montana. Anaconda Copper Mining Company. Smokestack,...

Picryl description: Public domain image of a tower, column, chimney, free to use, no copyright restrictions.

New York, New York. Class in the use of precision instruments, part of the government-sponsored industrial training program at New York University. Most of the students are women. Testing diameter variations and concentricity of ground stepped shafts with a comparator. The readings are in 10,000ths of an inch

New York, New York. Class in the use of precision instruments, part of...

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

Tanganyika. Ngorongoro Crater. Looking across the crater. Twelve miles diameter

Tanganyika. Ngorongoro Crater. Looking across the crater. Twelve miles...

Public domain photograph of National Park, nature, free to use, no copyright restrictions image - Picryl description

Aluminum casting. This special gauge checks diameter of the piston skirt. Made of aluminum, this piston will be used in army jeeps, and is one of the products of a large Midwest factory now converted to manufacture of war essentials. Aluminum Industries Inc., Cincinnati, Ohio

Aluminum casting. This special gauge checks diameter of the piston ski...

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

Women in industry. Tool production. Testing small diameter, high-speed twist drills, this young woman employed by a Midwest drill and tool company is one of America's women "behind the men behind the guns." Drills must be perfectly made so that the nation's war weapons can be built to accurate specifications. Republic Drill and Tool Company, Chicago, Illinois

Women in industry. Tool production. Testing small diameter, high-spee...

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.

Anaconda smelter, Montana. Anaconda Copper Mining Company. Base of the smokestack which is seventy-five feet in diameter

Anaconda smelter, Montana. Anaconda Copper Mining Company. Base of the...

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

America's petroleum industries pour out fuel and lubricants for the United Nations. Over hills and mountains, across broad rivers and through densely weeded regious runs what the U.S. calls the "Big Inch," the largest oil pipeline in the world, built specially to expedite supplies of oil derivatives to U.S. armed forces and the armies of the United Nations. The pipe line extends from the oil fields of the U.S. southwest state of Texas to the New York City - Philadelphia oil district of the U.S. eastern Atlantic coast, a distance of almost 1,400 miles (2240 kilometers). It is 24 inches in diameter and delivers a daily flow of 300,000 barrels. The picture shows the pipeline in the course of building. A section, before being lowered into the trench built to receive it, has been coated with hot asphalt paint. The completed pipeline cost $95,000,000

America's petroleum industries pour out fuel and lubricants for the Un...

Picryl description: Public domain photograph of a pipe, pipeline, excavation, free to use, no copyright restrictions.

Devil's Tower. With water scene from east side, 1200 high, 800 diameter. Description furnished free

Devil's Tower. With water scene from east side, 1200 high, 800 diamete...

Distant view of Devils Tower in center; pool of water in foreground. Copyright deposit. Title transcribed from item. Forms part of the John C. H. Grabill Collection.

Wood cutter standing in front of log with a diameter almost equal his height

Wood cutter standing in front of log with a diameter almost equal his ...

Title transcribed from caption accompanying item. Forms part of: Frank and Frances Carpenter collection (Library of Congress). Gift; Mrs. W. Chapin Huntington; 1951.

Mammoth trees, Cal. House over the stump of the original big tree, diameter 32 feet, Mammoth Grove, Calaveras Co.

Mammoth trees, Cal. House over the stump of the original big tree, dia...

No. 880. Forms part of the Marian S. Carson Collection at the Library of Congress.

Grizzly Giant, 33 feet diameter, Mariposa Grove, Mariposa County, Cal.

Grizzly Giant, 33 feet diameter, Mariposa Grove, Mariposa County, Cal.

Stereograph showing Grizzly Giant tree. No. 1162. Part of series: Watkins' Pacific Coast.

Adding the bead wire. Taking a more solid form, the carcass is now ready for the addition of another bead before the final layers of fabric are added. The bead cover is shaped to the exact curvature of the tire, and fits its diameter perfectly. The bead is forced into position under pressure by the machine controlled with the worker's right hand. Firestone (General Tires), Akron, Ohio

Adding the bead wire. Taking a more solid form, the carcass is now rea...

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

Conservation. Glass gauges replacing steel. Checking an inside diameter of a cartridge case with one of the glass gauges which replace steel gauges at the Frankford Arsenal. Glass gauges are lighter and cheaper than steel, permit greater visibility in inspection, are not as much affected by room temperatures and heat of operators' hands, are not corroded by perspiration, need no protection against rusting, do not acquire burrs that would change the effective sizes. They can save the annual use of 250 tons of critical tool steel in government arsenals alone

Conservation. Glass gauges replacing steel. Checking an inside diamete...

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

Conservation. Glass gauges replacing steel. A steel plug gauge, since replaced by a glass gauge at the Frankford Arsenal, is shown checking an inside diameter of a cartridge case. Glass gauges are lighter and cheaper than steel, permit greater visibility in inspection, are not as much affected by room temperatures and heat of operators' hands, are not corroded by perspiration, need no protection against rusting, do not acquire burrs that would change the effective sizes. They can save the annual use of 250 tons of critical tool steel in government arsenals alone

Conservation. Glass gauges replacing steel. A steel plug gauge, since ...

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

The Lick telescope, length 57 feet, diameter of object glass 36 inches, total weight 40 tons / W.J. Morgan & Co. Lith. Cleveland, O.

The Lick telescope, length 57 feet, diameter of object glass 36 inches...

Print shows an interior view of the Lick Observatory with the Lick telescope mounted on a large stand and being manipulated by a man standing on the top level, with a man sitting on a small moveable platform be... More

Miss Rosa D. Stone at Pan-Amer. bldg. holding a piece of Guayacan wood, 30'' in diameter which weighs 23 oz. while the Balsa wood with 402 sq. inches of surface weighs the same. Balsa is a recent importation from Latin Amer. and is used as substitute for cork. Already popular not only as filler for life-preservers but as stopper for the modern flask [Washington, D.C.]

Miss Rosa D. Stone at Pan-Amer. bldg. holding a piece of Guayacan wood...

A black and white photo of a woman standing on a sidewalk. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Largest perfect sphere of crystal in world now in National Museum. The National Museum in Washington has been presented with a perfect sphere of flawless crystal, believed to be the largest in the world. It is 12 and seve and seven eighths inches in diameter and weighs 106 pounds. Captain George Johnson, of the museum guards, is shown in photograph

Largest perfect sphere of crystal in world now in National Museum. The...

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

A New York City watch manufacturer, making clocks for airplanes, is seeking automatic screw machine facilities for the manufacture of twenty-thousand to thirty-thousand small clock gears. Material: high carbon steel, oil hardened. Dimentsions: O.D. .3685 inches; diameter at base of teeth. .3355 inches; Thirty-six teeth, depth, .0165 inches; thickness, .046 inches; diameter center hole, .1 inches

A New York City watch manufacturer, making clocks for airplanes, is se...

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

Conversion. Copper and brass processing. Stocks of partially completed lengths of seamless copper tube in many sizes. These have still to go through several more draws through dies on drawbenches. Each draw reduces them in diameter and wall thickness, and lengthens them out. Then, before the tubes leaves the mill, the ends will be sawed off straight and clean. Chase Copper and Brass Company, Euclid, Ohio

Conversion. Copper and brass processing. Stocks of partially completed...

Picryl description: Public domain photograph of lumber, lumberjack workers, 1930s, Great Depression, economic conditions, free to use, no copyright restrictions.

Section of the Grizzly Giant, 33 feet diameter, Mariposa Grove, Mariposa county, Cal.

Section of the Grizzly Giant, 33 feet diameter, Mariposa Grove, Maripo...

Public domain photograph of rural landscape, California, no copyright restrictions image - Picryl description

Washington National Monument proposed height in dotted lines, 485 ft. Completed, shown by dark lines, 174 ft. Stone terrace, 25 ft. high, diameter 200 ft.

Washington National Monument proposed height in dotted lines, 485 ft. ...

Print showing a drawing of Washington Monument half completed with dotted lines representing the proposed height. Drawing possibly drawn by Fred D. Stuart.

Section of the Original Big Tree, diameter 30 feet, Calaveras County

Section of the Original Big Tree, diameter 30 feet, Calaveras County

The Library holds only one photo from a pair published as a stereographic view. Gems of California scenery, no. 878. LOT subdivision subject: Calaveras Big Trees. This record contains unverified old data from c... More

Calaveras big trees. The sentinels, 315 feet high, 23 feet diameter, Mammoth Grove, Calaveras County

Calaveras big trees. The sentinels, 315 feet high, 23 feet diameter, M...

Photograph shows a grove of giant sequoias. No. 875. Public domain photograph of 19th-century stereoscopic card, landscape, free to use, no copyright restrictions image - Picryl description

Emir Saud's visit to Emir Abdullah in Amman. Trays six feet in diameter loades with rice & meats for the feast

Emir Saud's visit to Emir Abdullah in Amman. Trays six feet in diamete...

Public domain photograph - historical image of Jordan, Middle East, free to use, no copyright restrictions image - Picryl description

Conversion. Copper and brass processing. Here is a stock of billets, or solid cylindrical brass or copper castings, which have been sawed to length. These billets will be heated and put through a powerful extrusion machine, which will extrude rods, tubes or other special shapes from them. Billets are cast six inches to eight inches in diameter and usually from four to ten feet long. These are sawed to shorter lengths before they go to the extrusion machines. Chase Brass and Copper Company, Euclid, Ohio

Conversion. Copper and brass processing. Here is a stock of billets, o...

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.

The Great Tree Wawona, Height 260 Ft., Diameter 28 Ft., Mariposa Grove, Calif.

The Great Tree Wawona, Height 260 Ft., Diameter 28 Ft., Mariposa Grove...

3 people in horse-drawn wagon coming through cut in tree; 5 women standing alongside the tree; man with camera on tripod in foreground. Stereo by William Rau, copyrighted by E.W. Kelley. Sold only by Universal ... More

Washington logging train going down a mountain, on which are logs from a fir tree 12 feet in diameter

Washington logging train going down a mountain, on which are logs from...

Picryl description: Public domain image of a locomotive, train cars, railroad tracks, railway, 19th-20th century, free to use, no copyright restrictions.

Anaconda smelter, Montana. Anaconda Copper Mining Company. Looking up the hill towards the smokestack which is the largest in the world: 585 feet high with diameter at base seventy-five feet and at top sixty feet

Anaconda smelter, Montana. Anaconda Copper Mining Company. Looking up ...

Picryl description: Public domain image of a historical building, landmark architecture, world heritage, free to use, no copyright restrictions.

Pacific Highway through a Washington red cedar stump, 20 feet in diameter

Pacific Highway through a Washington red cedar stump, 20 feet in diame...

Photograph shows man and automobile in tunnel of giant tree stump. Annenberg batch 4

Wood cutter standing in front of log with a diameter almost equal his height

Wood cutter standing in front of log with a diameter almost equal his ...

Title transcribed from caption accompanying item. Forms part of: Frank and Frances Carpenter collection (Library of Congress). Gift; Mrs. W. Chapin Huntington; 1951.

Pioneer's Cabin - near view, diameter 32 feet, Mammoth Grove, Calaveras County

Pioneer's Cabin - near view, diameter 32 feet, Mammoth Grove, Calavera...

The Library holds only one photo from a pair published as a stereographic view. Gems of California scenery, no. 886. LOT subdivision subject: Calaveras Big Trees. This record contains unverified old data from c... More

Siphon--the world's longest--which carries water five miles to Dead Ox Flat. It is eight feet in diameter. Malheur County, Oregon

Siphon--the world's longest--which carries water five miles to Dead Ox...

Public domain image of an arch structure, bridge, historic place ruins, classical architecture, free to use, no copyright restrictions - Picryl description

Butte, Montana. Anaconda Copper Mining Company. Machinist measuring diameter of pump plunger which he is making in the machine shop

Butte, Montana. Anaconda Copper Mining Company. Machinist measuring di...

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.

Conversion. Copper and brass processing. Gaging copper rotating bands. These bands are sawed from long copper tubes, machined to size, serrated and applied like a collar to projectiles. These copper rotating bands fit the serrations inside gun barrels, and make the projectile rotate as it is shot from the gun. The man in this picture is checking the diameter of the bands as they come from the saws, before they are machined. Chase Copper and Brass Company, Euclid, Ohio

Conversion. Copper and brass processing. Gaging copper rotating bands....

Picryl description: Public domain photograph of worker, marketplace, vendor, 1930s, Great Depression, economic conditions, free to use, no copyright restrictions.

Stump of the original Big Tree - Diameter 32 ft. - Mammoth Grove Hotel

Stump of the original Big Tree - Diameter 32 ft. - Mammoth Grove Hotel

The Library holds only one photo from a pair published as a stereographic view. Gems of California scenery, no. 880. LOT subdivision subject: Calaveras Big Trees. This record contains unverified old data from c... More

Section of Penn. R. R. tunnel under the Hudson River at N. Y. City, exhibited at World's Fair, St. Louis, Mo., 1904. Diameter 21 feet

Section of Penn. R. R. tunnel under the Hudson River at N. Y. City, ex...

H62037 U.S. Copyright Office. No. 630. Public domain photograph of the train tunnel, railroad, train track, free to use, no copyright restrictions image - Picryl description

Conversion. Copper and brass processing. Drawing seamless copper tube. Rough cast tubes tapered at one end to fit through a die are gripped in the tongs of the electric motor-driven vehicle on the drawbench and pulled or "drawn" through the die to be reduced to the desired size. Tubes usually are redrawn many times; each successive "draw" reduces the diameter, and increases the length. Brass tubes need to be annealed or softened between each draw, but copper tubes can be drawn several times without intermediate annealing. The tapered nose of the tubes may be seen just behind the drawbench operator. Chase Copper and Brass Company, Euclid, Ohio

Conversion. Copper and brass processing. Drawing seamless copper tube....

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

Grizzly Giant, 33 feet diameter, Mariposa Grove, Mariposa County, Cal.

Grizzly Giant, 33 feet diameter, Mariposa Grove, Mariposa County, Cal.

Stereograph showing Grizzly Giant tree. No. 1162. Part of series: Watkins' Pacific Coast.

Giant wheels ten feet in diameter, once used for carrying logs to sawmill, Michigan

Giant wheels ten feet in diameter, once used for carrying logs to sawm...

Picryl description: Public domain image of a tractor, farming equipment, agriculture, 20th century, free to use, no copyright restrictions.

Conservation. Glass gauges replacing steel. Checking the outside diameter of a gear with one of the glass ring gauges, that are replacing steel gauges at the Frankford Arsenal. Glass gauges are lighter and cheaper than steel, permit greater visibility in inspection, are not as much affected by room temperatures and heat of operators' hands, are not corroded by perspiration, need no protection against rusting, do not acquire burrs that would change the effective sizes. They can save the annual use of 250 tons of critical tool steel in government arsenals alone

Conservation. Glass gauges replacing steel. Checking the outside diame...

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

Section of the Grizzly Giant, 33 feet in diameter, Mariposa Grove, Mariposa County, Cal.

Section of the Grizzly Giant, 33 feet in diameter, Mariposa Grove, Mar...

Stereograph showing a man standing in front of the Grizzly Giant tree. No. 1164. Part of series: Watkins' Pacific Coast.

Siphon--the world's longest--which carries water five miles to Dead Ox Flat. It is eight feet in diameter. Malheur County, Oregon

Siphon--the world's longest--which carries water five miles to Dead Ox...

Public domain image of an arch structure, bridge, historic place ruins, classical architecture, free to use, no copyright restrictions - Picryl description

It has to be right. Gauging the diameter of the barrel of a Garand rifle following grinding. An eastern armory is turning out these rifles for the war program

It has to be right. Gauging the diameter of the barrel of a Garand rif...

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

America's petroleum industries pour out fuel and lubricants for the United Nations. The largest oil pipeline ever laid runs from the U.S. southwest state of Texas eastward to the Atlantic coast, a distance of almost 1,400 (2240 kilometers) miles, over which 300,000 barrels of oil every day is being pumped to help supply the enormous war demands of the armed forces of the U.S. and the United Nations. The pipeline is 24 inches in diameter and cost $95,000,000 to complete. The section being laid in the ground has been given a coat of hot asphalt paint. The building of the pipeline insured a steady flow of fuel oil from the oil fields to Atlantic coast ports

America's petroleum industries pour out fuel and lubricants for the Un...

Picryl description: Public domain photograph of a pipe, pipeline, excavation, free to use, no copyright restrictions.

Mammoth trees, Cal. House over the stump of the original big tree, diameter 32 feet, Mammoth Grove, Calaveras Co.

Mammoth trees, Cal. House over the stump of the original big tree, dia...

No. 880. Forms part of the Marian S. Carson Collection at the Library of Congress.

The great floral clock, it's dial 100 feet in diameter, World's Fair, St. Louis, U. S. A.

The great floral clock, it's dial 100 feet in diameter, World's Fair, ...

Public domain photo of a monument, historic place, free to use, no copyright restrictions image - Picryl description

Substitute materials. Interior view of two-foot section of built-up wooden pipe, twenty-four inches in diameter. These pipes, used in place of corrugated iron or reinforced concrete pipes, are made of sections cut from short lengths of wood. About 100,000 feet of these wooden pipes were installed in 1942 in drainage culverts, storm sewers and conduits under highways and at army camps, naval stations, airfields and ordnance plants

Substitute materials. Interior view of two-foot section of built-up wo...

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

Siphon--the world's longest--which carries water five miles to Dead Ox Flat. It is eight feet in diameter. Malheur County, Oregon

Siphon--the world's longest--which carries water five miles to Dead Ox...

Public domain image of an arch structure, bridge, historic place ruins, classical architecture, free to use, no copyright restrictions - Picryl description

Conversion. Copper and brass processing. The inside of a large brass and copper tube mill. Copper tubes are made in many sizes, and in many alloys, and are needed for war production in hundreds of different ways--from small diameter tubing for gas and oil lines in airplanes and tanks and motor cars to large diameter tubes used in construction of our battleships. A tube annealing furnace may be seen to the right. Chase Brass and Copper Company, Euclid, Ohio

Conversion. Copper and brass processing. The inside of a large brass a...

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.

Conservation. Glass gauges replacing steel. Checking the inside diameter of a cartridge case with one of the glass gauges, which are replacing steel gauges at the Frankford Arsenal. Glass gauges are lighter and cheaper than steel, permit greater visibility in inspection, are not as much affected by room temperatures and heat of operators' hands, are not corroded by perspiration, need no protection against rusting, do not acquire burrs that would change the effective sizes. They can save the annual use of 250 tons of critical tool steel in government arsenals alone

Conservation. Glass gauges replacing steel. Checking the inside diamet...

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

Detroit, Michigan. Assembly of Rolls Royce engines at the Packard motor car company. Checking pitch diameter of threaded parts with an inspector

Detroit, Michigan. Assembly of Rolls Royce engines at the Packard moto...

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

Conservation. Glass gauges replacing steel. A plain plug glass gauge, which replaces a steel gauge in the Frankford Arsenal, is used to determine the inside diameter of a metal part. Glass gauges are lighter and cheaper than steel, permit greater visibility in inspection, are not as much affected by room temperatures and heat of operators' hands, are not corroded by perspiration, need no protection against rusting, do not acquire burrs that would change the effective sizes. They can save the annual use of 250 tons of critical tool steel in government arsenals alone

Conservation. Glass gauges replacing steel. A plain plug glass gauge, ...

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

Section of the Grizzly Giant, 33 feet diameter, Mariposa Grove, Mariposa county, Cal.

Section of the Grizzly Giant, 33 feet diameter, Mariposa Grove, Maripo...

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

And now we have the "wool meter." Speaking of taxi-meters, yardsticks, and other measuring devices, the "wool meter" has been introduced by the Bureau of Standards. Described by the forbidding name "eriometer," this new instrument is intended to measure the diameter of wool fibers and thus indicate the relative qualities of the fleece entering into our wool clothes. H.J. McNicholas of the Textile Section is shown with his invention, which employs the principle of diffraction of light

And now we have the "wool meter." Speaking of taxi-meters, yardsticks,...

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

Conversion. Copper and brass processing. Drawing seamless copper tube. Rough cast tubes tapered at one end to fit through a die are gripped in the tongs of the electric motor-driven vehicle on the drawbench and pulled or "drawn" through the die to reduce them to the desired size. Tubes usually are redrawn many times; each successive "draw" reduces the diameter, and increases the length. Brass tubes need to be annealed or softened between each draw, but copper tubes can be drawn several times without intermediate annealing. The tapered nose of the tubes may be seen just behind the drawbench operator. The tube is checked with a micrometer after being drawn, to make sure it is the right diameter. The man looking through the short section of tube is inspecting the inner surface for flaws. The Chase Copper and Brass Company, Euclid, Ohio

Conversion. Copper and brass processing. Drawing seamless copper tube....

Public domain photograph of car garage, repair shop, 20th century, free to use, no copyright restrictions image - Picryl description

Substitute materials. Wood culverts for steel. Assembly of an emergency sectional wood pipe, twenty-four inches in diameter. These pipes, used in place of corrugated iron or reinforced concrete pipes, are made of sections cut from short lengths of wood. Locking of adjacent rings with hardwood dowel pins produces a flexible structure. About 100,000 feet of these wooden pipes were installed in 1942 in drainage culverts, storm sewers and conduits under highways and at army camps, naval stations, airfields and ordnance plants

Substitute materials. Wood culverts for steel. Assembly of an emergenc...

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