Tyndall, John, 1820-1893 · New York : Appleton · leaf 139
length, the bow is drawn across the shorter section; theremaining three-fourths divide themselves into three ven 132 SOUND. tral segments, with two nodes between them. This isproved by the unhorsing of the three riders placed astridethe ventral segments, the two at the nodes keeping theirplaces… … its length, and arranging, as before, the red riders on theventral segments and the blue ones on the nodes, by asingle sweep of the bow the four red riders are unhorsed,and the three blue ones left undisturbed, Fig. M. In thisway we perform with a sounding string the same series of Fio. 44.
Sound
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