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Photographers
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Contents
Connections
Themes
Abstract
Advertising
Aerial
Architecture
Art
Commercial
Documentary
Erotica and nudes
Experimental photography
Fashion
Landscape
Literature
Nature
Photojournalism
Photomontage
Pictorialism
Portrait
Scientific
Spirit photography
Sports and pastimes
Still life
Street
Transportation
Travel
Typologies
Vernacular
War
Images
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Visual indexes
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Photo outlets
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1830-1839
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1860-1879
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1900-1919
1920-1939
1940-1959
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The Stereographs Project
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Photographers
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LL/6639
Unidentified photographer / artist
1938
, 17 August
Tepco Electric Heating Unit [New invention which represents a thermostat controlled hot water bottle heating unit]
National Museum of American History, Smithsonian Institution
© Thermo Electric - courtesy of Smithsonian National Museum of American History (Science Service Ref: CD 1963046 E&MP 22.001)
LL/6639
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