Ball, W. W. Rouse (Walter William Rouse), 1850-1925 · London, Macmillan · leaf 375
hich lies across the base of the right middle-finger. The hands arenow drawn apart so as to make the strings taut. The figure known as Snuffer-Trays—^eo. figure ii—ie formedby six loops, three on each hand. Four of the strings crossdiamond-wise in the middle so as to form two side crosses andtwo… … Figure ii. Snuffer-Trays. Snuffer-Trays can be got from the Cradle thus. I suppose that the Cradleis held by one operator, P, and that the other operator, Q, faces P. First.Q inserts the thumb and index-finger of his left hand from his far side in thoseangles of the cross of the Cradle farthest…
Mathematical recreations · Geometry · Astrology · Space and time · Matter · Magic squares
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