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  1. Apr 2024
    1. The first draft of this scheme of indexing was worked out inPhiladelphia in 1896-7 and after some years of constant appli-cation involving an index of some 50,000 cards it was re-written-in the light of experience gained.

      Julius Kaiser built a card index (zettelkasten) of 50,000 index cards based on a system he says he worked out between 1896-7 when he was Librarian of the Philadelphia Commercial Museum. In following years he applied the system to three additional card indexes (of unmentioned sizes).

      His experience in doing this provides significant ethos for his coming arguments and discussion.