Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 601
uired besides a glass balloon. The cut represents asmall torsion balance of extreme simplicity. A thinplatinum wire is stretched horizontally through two staples,from the wooden supports, AB, which are fixed in a dealboard. A very thin, delicate lever, CD, cut in wood, ormade with a wisp of straw,… … Torsion balance, which can ea<;ily be constructed, capable of weighing a milligramone-tenth of full size a paper scale, on which is put the weight of a centigram.The lever is lowered to a certain point, slightly twistingthe platinum wire. Near the end of the lever a piece ofwood, F, is fixed, on…
Scientific recreations
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