Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 866
ll the cardsin the tin case of any district have thus gone through the press, the record taken from thedials will show the number of males, females, white, colored, etc., while the cards will havebeen assorted into age groups. The machine, however, is capable of more than this. In statistical work… … Fig. 6.- Hollerith sorting box. know how many dwellers in this country are males and how many are female? ; also howmany are white, and how many are colored. But it is at least as essential to know how manyof the white males are native born or foreign born, and how many are the children of…
Mechanical engineering
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