A Census Bureau employee uses a Hollerith Tabulator to tabulate results from the 1900 census. The results of the tabulation are displayed on dials and he is manually operating a "pantograph" with his left hand and a card reading press with his right hand. The pantograph punched holes in cards for tabulation. The press contained metal pins that passed through the punched cards holes completing an electrical circuit when each pin made contact with a well of mercury below each hole, tabulating the data each hole represented on the dials.

Year: 1904