Excerpt from The Earth and Its Chief Motions, and the Tangent Index The Object of these lines is to furnish some 'help to those who are studying the elements of astronomy, by assisting them to com prehend the most important of our astronomical relations. We find ourselves inhabitants Of a world which to our senses is infinite, and fixed in its place. When we attempt to explore it, we find ourselves held within certain limits. Some Of these limits seas, deserts, _wildernesses-human ingenuity and perseverance enable the explorer to break through Other limits we know can never be passed over. Still others are doubtful. Thus we never expect to penetrate deep into the earth. We cannot rise much above its surface. Travelers ascending mountains, or navigating the air in balloons, imperil their lives, and not infrequently lose them.
At most, the height to be attained in either Of these ways is small. 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.