Excerpt from A Short System of Practical Arithmetic, Compiled From the Best Authorities, to Which Is Annexed a Short Plan of Book-Keeping: The Whole Designed for the Use of Schools Compound Interest in Decimals, 167 Table of the amount of £i, or 81, at 5 and 6 per cent. Per aunum, compound inter est, for 20 years, Annuities at compound interest, 168 Involution, 169 Evolution, or Extraction 170 of Roots, Application and Use of e g Square Root, Cube Root, Application and Use of the Cube Root. 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.