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united states history

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safety film negatives

1940 s

40 s

american

aeronautics

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Oil field worker examining mud to determine characteristics of stratum through which drilling is being done, Seminole oil field, Oklahoma

Oil field worker examining mud to determine characteristics of stratum...

Picryl description: Public domain image of a construction site, wooden frame, timber, free to use, no copyright restrictions.

Trailer in trailer court. This trailer is obviously unmovable and because this court is assuming the characteristics of a shack town and because the sanitary facilities are inadequate, it will probably be condemned by board of health. San Diego, California

Trailer in trailer court. This trailer is obviously unmovable and beca...

Public domain photograph of rural California, dust bowl refugees, 1930s-1940s, no copyright restrictions image - Picryl description

Howard Stonaker, a graduate student in advanced genetics working on a study of inheritance using Drosophila (flies) for his experiemnts by keeping accurate records of all the generations' inheritance characteristics. Iowa State College. Ames, Iowa

Howard Stonaker, a graduate student in advanced genetics working on a ...

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

Uncle Sam to standardize garmet sizes. Washington D.C., July 23. To enable fathers and mothers to order clothes with the confidence that a size 8 or 10, is all its supposed to be in length and breadth, the Bureau of Economics, U.S. Department of Agriculture, is undertaking the leadership of project in which colleges and universities will cooperate to discover the clothing dimensions needed by today's children.. Special attention is being paid to racial characteristics as the experts believe that race and neighborhood has something to do with a youngster's size. Dr. Eleanor Hunt, associate anthropometrist, Bureau of Home Economics, is shown training one of the first classes on taking scientific measurements of the human body, 7/23/37

Uncle Sam to standardize garmet sizes. Washington D.C., July 23. To en...

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

A scale wind tunnel model of North American Aviation's P-51 fighter is prepared by two model shop employees before another test is made to determine its flight characteristics. All measurements on these models are within two thousandths of an inch

A scale wind tunnel model of North American Aviation's P-51 fighter is...

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

Agriculturalist wields brush for posterity. Royal C. Steadman, 20-year veteran of the Agriculture Department, wields his brush on wax models of apples, pears and other fruits so that the department archives will have a permanent record of outstanding characteristics of different varieties. Steadman has developed a technique for this type of art work which results in a very delectable wax apple. 12/4/35

Agriculturalist wields brush for posterity. Royal C. Steadman, 20-year...

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

Trailer in trailer court. This trailer is obviously unmovable and because this court is assuming the characteristics of a shack town and because the sanitary facilities are inadequate, it will probably be condemned by board of health. San Diego, California

Trailer in trailer court. This trailer is obviously unmovable and beca...

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

Chickamauga Dam and powerhouse. One of the headquarters buildings of farmers' cooperatives which distribute TVA (Tennessee Valley Authority) power. With comfortable lounges, meeting rooms, and up-to-snuff shops, garages and offices, such buildings become centers of interest in the small towns in which they are located (quoted from previously written caption). Headquarters building of the rural power distribution cooperative at Shelbyville, Tennessee (see general comments under K 2382). In the design of these structures a certain degree of uniformity is observed to express the fact that they are parts of a nationwide system. The symbol REA stands for Rural Electrification Administration which by engineering, financing, and general guidance promotes rural electrical cooperatives throughout the United States and its territories. Each design is individually developed, however, from the special requirements of the organization and with attention to location and site characteristics

Chickamauga Dam and powerhouse. One of the headquarters buildings of f...

Picryl description: Public domain image of a power dam, cascade, free to use, no copyright restrictions.

Fiberglass manufacture, Owens-Corning, Toledo, Ohio. To provide accurate performance data, this engineer is one of many in the physical testing laboratories of Owens-Corning Fiberglass Corporation who measures insulating characteristics of fiberglass materials

Fiberglass manufacture, Owens-Corning, Toledo, Ohio. To provide accura...

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

Students at Washington High School at class, training for specific contributions to the war effort, Los Angeles, Calif. Ralph Angar, instructor, explains propeller characteristics to student[s] in the aeronautics class

Students at Washington High School at class, training for specific con...

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

Engineers study the flight characteristics of a North American B-25 scale model in the wind tunnel

Engineers study the flight characteristics of a North American B-25 sc...

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

High school Victory Corps. Rudolph Angar, instructor, explains propeller characteristics to students in the aeronautics class at Washington High School, Los Angeles, California. Girls as well as boys are needed in airplane mechanics

High school Victory Corps. Rudolph Angar, instructor, explains propell...

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

A scale wind tunnel model of North American Aviation's P-51 fighter is prepared by two model shop employees before another test is made to determine its flight characteristics. All measurements on these models are within two thousandths of an inch

A scale wind tunnel model of North American Aviation's P-51 fighter is...

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

Experts at Bureau of Standards study effect of corrosive soils on specimens of pipe. Washington, D.C., Aug. 8. Of interest to home builders the country over is the study being made by experts at the National Bureau of Standards of the effect of corrosive soils on pipes and protective materials. Samples of pipe which have been buried for four years in fifteen soils differing widely in their characteristics, are being tested. Included are several varieties of ferrous materials as well as copper, brass, and bronze. Soldered and brazed joints, protective materials, and pipe made of a composition of cement and asbestos are also represented. Walter Johnson, of the Bureau, is pictured removing graphitic corrosion from cast iron with an air-driven tool. The corrosion products are too hard to be removed with a brush or by chemical treatment, 8/8/38

Experts at Bureau of Standards study effect of corrosive soils on spec...

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

Science and research. Studies of non-coking coals. V.F. Parry, supervising engineer of the Golden, Colorado field station of the U.S. Bureau of Mines is "sighting a coke bubble." This procedure is used to determine if a given coke has changed its properties or it is similar to another coke. One gram of powdered coal is heated at 820 degrees centigrade for two and a half minutes. The resulting "bubble" is then compared with a standard chart to determine its characteristics, as revealed by the shape it has assumed. This research is part of a project to find ways of improving the quality of coke from western coal

Science and research. Studies of non-coking coals. V.F. Parry, supervi...

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

Production. B-25 bombers. A line of B-25 "Billy Mitchell" medium bombers, just off the production line of a Western plant, await tests before acceptance by the Army. The battle-tested B-25, mounting heavy caliber machine guns, can serve as an escort as well as a bomber. Its speed, long range and good load-carrying characteristics make it a versatile and effective military plane

Production. B-25 bombers. A line of B-25 "Billy Mitchell" medium bombe...

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