Page:Graphic methods for presenting facts (1914).djvu/340

 Fig. 228. Punched Card Such as Was Used by the United States Government for Tabulating the 1910 Census by Electric Card-Sorting and Tabulating Machines

There was a card similar to this for each inhabitant of the country. Holes punched at different positions in various columns represent the answers to all questions asked by the census enumerator regarding race, place of birth, age, etc. Punched-card systems can often be used advantageously for the cost and statistical work of corporations