Ball, W. W. Rouse (Walter William Rouse), 1850-1925 · London, Macmillan · leaf 172
s A,B, ...^H; 8 pencils, with verticesA,...,H; one pencil with its vertex at 0; and one pencil withits vertex on the axis of the last-named pencil. The sum of the numbers in each of the 18 lines in figure xiiis the same. To make figure xv correspond to this we mustnumber the lines in the pencil A… … B C D E ^ G Figure xv. A Magic Pencil, w=8. 150 MAGIC SQUARES (CH. VII the points of their intersection with the cross-joins be joinedcross-wise, these new cross-joins will intersect on the axis of theoriginal pencil or on lines perpendicular to it. The whole figurewill now give 8^ lines, arranged…
Mathematical recreations · Geometry · Astrology · Space and time · Matter · Magic squares
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