Excerpt from Euclid's Elements of Geometry, the First Six Books: To Which Are Added, Elements of Plain and Spherical Trigonometry, a System of Conick Sections, Elements of Natural Philosophy, as Far as It Relates to Astronomy, According To9 the Newtonlan System, and Elements of Astronomy: With Notes As to the manner in which this work has been executed; the figures, instead of being in plates, are on the page with the mat ter of the work, this being found by experience to be by far the best mode. 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.