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Conversion. Watch cases to war production. Volunteers for Victory. The fine machinery and skilled operators of a commercial watch case factory are now producing precision radio parts for the armed forces. Wadsworth Watch Company, Louisville, Kentucky
Subcontracting aircraft parts. High speed production of small parts for airplane sub-assembling is expedited by simultaneous use of the three drills shown. This plant has been converted from its former use as an airship dock. Goodyear, Akron, Ohio
Subcontracting aircraft parts. High speed production of small parts for airplane sub-assembling is expedited by simultaneous use of the three drills shown. This plant has been converted from its former use as an airship dock. Goodyear, Akron, Ohio
Production. Diesel engines. An inspector at a Midwest plant measures precision parts that will go into diesel engines being made for the Navy
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
Government discovers method to preseve film. Folding endurance test, The flexibility is measured in this folding endurance tester. A strip of film is folded back and forth under tension until it breaks, and the number of folds it withstands is counted. Three types of films have been studied, termed accoring to the chemical process of making them, acetate, viscose, and nitrate. The acetate base proved to be very stable on heating and is considered suitable for permanent records if properly made. The nitrate base became brittle quite raipidly and is considered unsuited for record purposes. The viscose base is in an intermediate position similar to that of record papers made from ordinary bleach wood fiber, 7/8/38
Government discovers method to preseve film. Folding endurance test, The flexibility is measured in this folding endurance tester. A strip of film is folded back and forth under tension until it breaks, and the number of folds it withstands is counted. Three types of films have been studied, termed accoring to the chemical process of making them, acetate, viscose, and nitrate. The acetate base proved to be very stable on heating and is considered suitable for permanent records if properly made. The nitrate base became brittle quite raipidly and is considered unsuited for record purposes. The viscose base is in an intermediate position similar to that of record papers made from ordinary bleach wood fiber, 7838
Conversion. Watch cases to war production. Volunteers for Victory. The fine machinery and skilled operators of a commercial watch case factory are now producing precision radio parts for the armed forces. Wadsworth Watch Company, Louisville, Kentucky
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Man with scientific instruments
[Woman with scientific instrument]
[Scientific instrument] - Public domain portrait photograph
[Woman with scientific instrument?]
[Scientific instruments?] - Glass negative photogrpah. Public domain.
[Scientific instruments?] - Glass negative photogrpah. Public domain.
[Man with weapons] - Public domain weapon photograph
[Scientific instruments?] - Glass negative photogrpah. Public domain.
[Man with violin] - A black and white photo of a man playing a violin
[Man with scientific instruments]
Summary
Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description
Tags
Date
01/01/1922
Contributors
Harris & Ewing, photographer
Location
Source
Library of Congress
Link
Copyright info
No known restrictions on publication.