Excerpt from The Ready Multiplier Further attention to the subject led him to extend the Tables to numbers between 20 and 30, and, in the same manner, between 30 and 40, 40 and 50, 50 and 60, 60 and 70, 70 and 80, 80 and 90, and 90 and 100. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.