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  1. Jul 2021
    1. Thomas Harrison, a 17th-century English inventor, devised the “ark of studies,” a small cabinet that allowed scholars to excerpt books and file their notes in a specific order. Readers would attach pieces of paper to metal hooks labeled by subject heading. Gottfried Wilhelm Leibniz, the German polymath and coinventor of calculus (with Isaac Newton), relied on Harrison’s cumbersome contraption in at least some of his research.

      Reference for this as well?

      Is this the same piece of library furniture that I've also recently read of Leibniz using?

    1. The first early modern card index was designed by Thomas Harrison (ca 1640s). Harrison's manuscript on The Ark of Studies[5] (Arca studiorum) was edited and improved by Vincent Placcius in his well-known handbook on excerpting methods (De arte excerpendi, 1689).