Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 398
A LENS. 41 between the light and the wall which acts as a screen, wesee the reflected light turned upside down by means of theconvergent lens we have improvised. A balloon of glassconstitutes an excellent microscope. It must be filledwith perfectly clear, limpid water, and closed by means ofa cork.… … A water-bottle employed as a convergent lens to support the object we wish to examine, which ismagnified several diameters. If a fly, for instance, is atthe end of the wire, we find it is highly magnified whenseen through the glass balloon. By examining the insectthrough the water in the balloon,…
Scientific recreations
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