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KEYWORDS: Technology & Equipment

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Date Format Image Collection
August 24, 1814 Correspondence    Document
April 17, 1927 Correspondence    Document
April 27, 1927 Correspondence    Document
August 30, 1890 Cover  Cover of Scientific American magazine, showing men and women working on census data using Hollerith Tabulator and its punch cards. Visual Still
October 12, 1899 Engraving  Desk for working on punch cards. Visual Still
October 12, 1899 Engraving  Man sitting at desk receiving sorted punch cards, Visual Still
October 12, 1899 Engraving  A mechanism for counting, a numbered dial on front. Visual Still
October 12, 1899 Engraving  Mechanism with punch on a lever. Visual Still
October 12, 1899 Engraving  Mechanism for punching cards on table. Visual Still
October 22, 1861 Government Document    Document
October 22, 1861 Government Document  Design drawing of J. Ruth Invalid Carriage. Visual Still
September 1931 Illustration  Drawings of two designs for accessible bathrooms. Visual Still
May 1933 Illustration  A drawing of a back brace. Visual Still
August 1933 Illustration  A drawing of people going up stairs, first a man in a wheelchair, then a man on crutches, then a woman using canes. Visual Still
1840 Illustration  Two pictures:Top picture-little boy on crutches; Bottom picture-leg bent at knee with a brace from ankle to thigh Visual Still
January 1933 Illustration  A design drawing of a steering wheel and clutch. Visual Still
January 1933 Illustration  A design drawing of a steering wheel. Visual Still
December 1932 Illustration  A drawing of the workings of a home elevator. Visual Still
September 1931 Illustration  Design drawing hand controls for brake and clutch. Visual Still
October 1933 Illustration  A design drawing of a clutch and braking mechanism. Visual Still
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