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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

NYA (National Youth Administration) work center, Brooklyn, New York. A Negro bench worker, who is receiving training in machine shop practice, removing the burrs from a side piece for a metal pulley block

NYA (National Youth Administration) work center, Brooklyn, New York. A...

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

Gist inspector, Mrs. Mary Betchner inspecting one of the 25 cutters for burrs before inserting it in the inside of a 105mm. howitzer at the Milwaukee, Wis. plant of the Chain Belt Co. Her son is in the army; her husband is in war work

Gist inspector, Mrs. Mary Betchner inspecting one of the 25 cutters fo...

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

Conservation. Glass gauges replacing steel. Markings are carried on a label pasted on the handle of a glass plug gauge, which replace steel gauges at the Frankford Arsenal. Markings on other gauges 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. Markings are carried on a ...

Public domain photograph of Pennsylvania in 1930s, 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...

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

NYA (National Youth Administration) work center, Brooklyn, New York. Two bench-lathe workers, white and Negro, who are receiving training in machine shop practice, removing burrs from special taper head screws

NYA (National Youth Administration) work center, Brooklyn, New York. T...

Public domain photograph related to race relations, African Americans, free to use, no copyright restrictions image - Picryl description

Conservation. Glass gauges replacing steel. Mr. A.E. Smith and Mr. Stanley Farrow (left to right) of Army Ordnance's Gage Section, discuss 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. Mr. A.E. Smith and Mr. Sta...

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

Conservation. Glass gauges replacing steel. Markings on the handles of new 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 of 250 tons of critical tool steel in government arsenals alone

Conservation. Glass gauges replacing steel. Markings on the handles of...

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

Production. B-24 bombers and C-87 transports. Nell Roy Johnson at her first job. She is filing burrs from parts to be used in making consolidated transport planes at a Western plant. This transport ship is adapted from the B-24 bomber, and carries one of the greatest human or cargo loads of any plane now in mass production.

Production. B-24 bombers and C-87 transports. Nell Roy Johnson at her ...

Public domain photograph of 1930s industry, war production in the United States 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.

NYA (National Youth Administration) work center, Brooklyn, New York. Two bench workers, who are receiving training in machine shop practice, removing the burrs from a side piece for a metal pulley block

NYA (National Youth Administration) work center, Brooklyn, New York. T...

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

Conservation. Glass gauges replacing steel. Brigadier General H.F. Safford, Chief of theProduction Service Branch, Ordnance Department, examines an exhibit of standard types of new 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. Brigadier General H.F. Saf...

Public domain photograph of the 1930s-1940s World War Two, armed forces, military production, 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

NYA (National Youth Administration) work center, Brooklyn, New York. Two bench workers, one white and one a Negro, who are receiving training in machine shop practice, removing the burrs from a side piece for a metal pulley block

NYA (National Youth Administration) work center, Brooklyn, New York. T...

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

Conservation. Glass gauges replacing steel. A steel plug gauge is compared with a glass plug gauge which replaces it at the Frankford Arsenal. A plain ring glass gauge shows in the foreground. Glass gauges are lighter and cheaper than steel, permit greatly 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 is comp...

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

Conservation. Glass gauges replacing steel. A glass ring gauge for the inspection of fuse parts. These gauges 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. A glass ring gauge for the...

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

Frederick, Maryland. A student pilot removing burrs from Greaseball, a mascot at the Stevens Airport

Frederick, Maryland. A student pilot removing burrs from Greaseball, a...

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

Production. B-25 bombers. Filing burrs from slots in sections of brass tubing used in construction of B-25 bombers at a Western aircraft plant. General Doolittle has called the ship the best military plane in existence. With plenty of speed, a 1700-mile cruising range and a ceiling of 25,000 feet, it has performed brilliantly as a medium bomber and as an escort plane. Fairfax bomber plant, Kansas City

Production. B-25 bombers. Filing burrs from slots in sections of brass...

Public domain photograph of the 1930s-1940s World War Two, armed forces, military production, no copyright restrictions image - Picryl description

Conservation. Glass gauges replacing steel. Inspecting a gear with a steel ring, since replaced by a glass gauge 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. Inspecting a gear with a ...

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

Conservation. Glass gauges replacing steel. Brigadier General H.F. Safford, Chief of Production Service Branch, Ordnance Department, examines an exhibit of standard types of new 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. Brigadier General H.F. Saf...

Public domain photograph of the 1930s-1940s World War Two, armed forces, military production, no copyright restrictions image - Picryl description

Conservation. Glass gauges replacing steel. Colonel H.B. Hambleton, Chief of Army Ordnance's Gage Section explains the virtues of a glass plug gauge to Mr. Thornton Lewis and Brigadier General H.F. Safford (left to right). 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. Colonel H.B. Hambleton, Ch...

Public domain photograph of the 1930s-1940s World War Two, armed forces, military production, no copyright restrictions image - Picryl description

Conservation. Glass gauges replacing steel. Glass gauges of various types are replacing steel gauges at the Frankford Arsenal. Left, top to bottom: double-end gauge, "go" plug gauge, ring gauge. Right, top to bottom: "not go" plug gauge, double and solid-handle plug gauge, double-end taper-lock standard, handle plug gauge. 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. Glass gauges of various ty...

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

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

Making the wire beads. Beads which reinforce the tire and hold it firmly on the rim, are made of the highest grade piano wire, and are extremely tough and durable. They must be made to precisely the correct length, and are foiled on the machine illustrated here. Care must be taken that there are no burrs, slivers or rough spots which might cut into the bead wrapping or fabric. General Tires, Akron, Ohio

Making the wire beads. Beads which reinforce the tire and hold it firm...

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

Production. 105 mm. howitzers. Mrs. Mary Betchner inspecting one of the twenty-five cutters for burrs before inserting it in the inside of a 105 mm. howitzer in the Milwaukee, Wisconsin plant of Chain Belt Company. Her son is in the Army; her husband and daughter are in war work

Production. 105 mm. howitzers. Mrs. Mary Betchner inspecting one of th...

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

NYA (National Youth Administration) work center, Brooklyn, New York. A Negro bench worker, who is receiving training in machine shop practice, removing the burrs from a side piece for a metal pulley block

NYA (National Youth Administration) work center, Brooklyn, New York. A...

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

Conservation. Glass gauges replacing steel. Markings on the handles of the new glass gauges, which replace steel gauges in the Frankford Arsenal, are produced by acid etching as shown on the attached labels. 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. Markings on the handles of...

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

Hop grower looks at the vines and burrs. Yakima County, Washington

Hop grower looks at the vines and burrs. Yakima County, Washington

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

NYA (National Youth Administration) work center, Brooklyn, New York. Two bench-lathe workers, who are receiving training in machine shop practice, removing burrs from special taper head screws

NYA (National Youth Administration) work center, Brooklyn, New York. T...

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

Production. 105 mm. howitzers. Mrs. Mary Betchner inspecting one of the twenty-five cutters for burrs before inserting it in the inside of a 105 mm. howitzer in the Milwaukee, Wisconsin plant of Chain Belt Company. Her son is in the Army; her husband and daughter are in war work

Production. 105 mm. howitzers. Mrs. Mary Betchner inspecting one of th...

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

NYA (National Youth Administration) work center, Brooklyn, New York. A Negro bench-lathe worker, who is receiving training in machine shop practice, removing burrs from a special taper head screw

NYA (National Youth Administration) work center, Brooklyn, New York. A...

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

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

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