Ball, W. W. Rouse (Walter William Rouse), 1850-1925 · London, Macmillan · leaf 176
ns, &c.) may be noticed inpassing, though I will not go into details. One instance willsuffice. Suppose a re-entrant octagon is constructed by the • E. Bergholt, Nature, London, vol. Lxxxm, Maj 26, 1910, pp. 368—369. CH. Vllj MAGIC SQUARES 155 intersecting sides of two equal concentric squares.… … 15 Magic Star.Figure xv. side of each square is equal to 34. Eighteen fundamental solu-tions exist. One of these is given above*. There are magic circles, rectangles, crosses, diamonds, andother figures: also magic cubes, cylinders, and spheres. Thetheory of the construction of such figures is of…
Geometry · Cryptography · Ciphers
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