Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 525
, feeling that it is the best means of showing howit is possible for everybody to reproduce these charmingcurves of musical intervals. Also I completely excludedthe employment of metals, and I constructed my apparatusentirely with pieces of wooden rulers, and old cigar boxes.I set to work in the… … The apparatus completed. as in the cut above. In these grooves nails- are placodwhich support the pendulums. The piece of wood isplaced on the corner of the table, so that the pendulumswhich oscillate in two planes at right angles, are in twoplanes that are sensibly parallel to the sides of the…
Scientific recreations
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