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KEYWORDS: SCIENCE, HEALTH & TECHNOLOGY

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Date Format Image Collection
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
1893 Photograph  Alexander Graham Bell speaks into a telephone.  A group of men in suits look on. Visual Still
1893 Book    Document
1893 Illustration  Sketch of child with drippy eyes. Visual Still
June 19, 1894 Patent    Document
June 19, 1894 Patent  Design drawing for O.L. Smith-Fraser Invalid Chair Visual Still
June 19, 1894 Patent  Design drawing for O.L. Smith-Fraser Invalid Chair, sheet 2. Visual Still
December 25, 1894 Patent    Document
December 25, 1894 Patent  Design drawing for S.A. Potter Invalid Chair, sheet 1. Visual Still
December 25, 1894 Patent  Design drawing for S.A. Potter Invalid Chair, sheet 2. Visual Still
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