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Wentworth and Smith
The titlepage mark depicts four mathamatical concepts, the pentagram in the lower right representing the golden ratio.
S. E. Slocum wrote: "The work certainly marks the greatest advance in the pedagogy of elementary mathematics which has yet appeared, and is deserving of a wide adoption as a text. [Shorter Notices, 1920, p. 375]
Junior High School Mathematics, George Wentworth and David Eugene Smith. Primary Book, Boston: Ginn and Company, 1919. Book 3; 282pp, price 96 cents. Source: etc.usf.edu/clipart accessed 2010/04/16.
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