Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 141
nation is simple. Prepare the, piece oflooking-glass, and let the operator draw upon it anydesign he , chooses with some fluor-hydric acid, which is,obtained by dissolving some powdered fluor spar in the 124 MECHANICAL TOYS, ETC ordinary sulphuric acid of commerce. When it is suciently liquefied… … Fig. gS. — Fantoccini Top. A little experience will decide the length of time requisitefor the proper production of the figure ; the acid if lefttoo long will eat into the glass, and the design will remainvisible even on tiie dry surface. MECHANICAL TOYS, ETC. 12 5 A FANTOCCINI TOP. This apparatus…
Scientific recreations
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