Jan Swammerdam (1637-1680) Dutch naturalist. Swammerdam's observations on the contraction of muscle. V: Dissected muscle with nerve attached (nerve-muscle preparation). VI: Nerve-muscle preparation in glass tube, tendons attached to pins. When nerve pinched, the muscle contracts and fills VIII: Nerve-muscle preparation in glass tube, one end closed with a cork, the other having narrow tube with water droplet at e. Nerve pulled by thread c. IX: Similar to VIII. Engraving from "Biblia Naturae" by Jan Swammerdam (1737-1738). (Photo by: Universal History Archive/UIG via Getty Images)
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