2775127 A Microscopic View of a drop of Water (engraving) by Bacon, John (1777-1859); Private Collection; (add.info.: A Microscopic View of a drop of Water with the different Animalcula - magnified 4000 times with the 2nd power of C Gould\'s Improved Pocket Compound Microscope. Illustration from The Companion to The Microscope by C Gould ( London, 1831).); Look and Learn / Valerie Jackson Harris Collection; English, out of copyright.