Ball, W. W. Rouse (Walter William Rouse), 1850-1925 · London, Macmillan and Co., limited · leaf 377
trings through two right angles taking the horizontal strings with them. Lastly. P pushes his fingers down, separates the index-fingers from the thumbs, and then, drawing his hands apart, removes the figure from Q’s hands. The figure now is in a horizontal plane ; but for clearness I have drawn it… … b. r. 23
Geometry · Astrology · Space and time · Matter · Magic squares · Mathematical recreations
Internet Archive · University of Illinois Urbana-Champaign · Public domain (published before 1931). Free to use for anything.
