ScientificAmerican1902-04-19.jpg Scientific American 1902-04-12ThumbnailsScientific American 1902-04-26Scientific American 1902-04-12ThumbnailsScientific American 1902-04-26Scientific American 1902-04-12ThumbnailsScientific American 1902-04-26Scientific American 1902-04-12ThumbnailsScientific American 1902-04-26Scientific American 1902-04-12ThumbnailsScientific American 1902-04-26

Census-taking by machinery. Hollerith card-puncher. Population-card punch. Tabulating and adding machine.



Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner