Tochio's Computation on the Soroban by Tochio Kintaro
Scarce and comprehensive guide to the Japanese abacus (soroban) which a skilled operator can use to calculate faster than the time it takes to enter numbers into an electronic calculator. Inscribed by Tochio to Dr. C[harles] W[illiam] Eliot, who was president of Harvard University for 40 years from 1869-1909.
Yokohama. Kelly and Walsh. 1912.
+34pp+. 22.8 x 15.7cm.
In almost fine condition. Minor wear at top and bottom of spine only.