New machine to speed up statistics of census of 1940. Washington, D.C., Dec. 2, Historic Print

Drawn from the Library of Congress archive, this print depicts New machine to speed up statistics of census of 1940. Washington, D.C., Dec. 2. The Library holds one of the most comprehensive collections of American and international historical prints in the world.

Library of Congress record: Created 1939 December 2 Title from unverified caption data received with the Harris & Ewing Collection. Gift; Harris & Ewing, Inc. 1955. General information about the Harris & Ewing Collection is available at New machine to speed up statistics of census of 1940. Washington, D.C., Dec. 2. Back in 1870, it took 7 years to compile statistics from the facts taken by census takers, but in the next 10 years, Herman Hollerith invented a 'unit tabulator,' shown on left of photo being operated by Operator Ann Oliver. This machine is fed cards containing census information at the rate of 400 a minute and from these, 12 separate bits of statistical information is extracted. Not so long ago,.

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