Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 407
a million letters in a twelvemonth; an adaptation of the 350 SIMPLIFICATION card-index makes any single letter accessible in half a minute atmost. To an extent which steadily grows, the same plan is oustingthe old-fashioned ledgers from our offices; in their stead we arenow using series of movable… … Notes on loose cards in alphabetical order. topic, as to demand laborious indexing. It is better to take thenotes in a form which will index itself. Slips of good paper canbe bought at low cost, and, as in the accompanying illustration,Astronomy, Glass, Photography, or other headings may beadopted.…
Inventions · Inventors
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