Harrison, Elizabeth, 1849-1927 · St. Louis, Mo., Chicago, Ill., Sigma publishing company · leaf 164
e shoe trapezoid", by withdraw- ing a similar triangle at the right of the figure so that its right corner and one sharp corner touch the central figure and its longest edge is to the front (see Fig. 30). This again changes into an elon- gated hexagon by transferring this last placed tri- angle to… … No. 2&-30-;31. Showing last three moves of sequence in "forms of knowledge" by such changes as result in pentagon, shoe- trapezoid and hexagon.
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