Excerpt from The Mechanics' Magazine, Museum, Register, Journal, and Gazette, 1830, Vol. 12 It has not unfrequently happened, that where science has left nothing to discover, it has still left much to be done in the way of practical application; and of this also, our present Volume exhibits a striking example in the article entitled Portable Trigonometry without Logarithms. W e have else where described it as worth apples of gold to practical men and the numerous testimonies of its value which we have since received from individuals of that description, convince us that we have not exaggerated its merits. 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.