Excerpt from Reminiscences and Letters of Sir Robert Ball IN the year 1906 my father decided to publish his Reminis cences. With this object in view he dictated a considerable amount of material. Before, however, he had made any serious inroad upon his store of pleasant memories, other duties compelled him to postpone the compilation for several years; failing health eventually prevented the completion of the work, or even the revision of the notes which he had dictated. It was at his request that I have undertaken the duties of editor. Although it is true that I have been able to record some matters which in his modesty he might have suppressed, it is to be regretted that the whole work was not prepared by himself. 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.

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Definitive reference on screw theory with important applications to complex engineering problems.

"Teachers' bulletin", vol. 4- issued as part of v. 23, no. 9-

Born in Ireland in the mid-nineteenth century, Agnes Mary Clerke achieved fame as the author of A History of Astronomy during the Nineteenth Century. Through her quarter-century career, she became the leading commentator on astronomy and astrophysics in the English-speaking world. The biography of Agnes Clerke describes the life and work of this extraordinary woman. It also chronicles the development of astronomy in the last decades of pre-Einstein science, and introduces many of the great figures in astronomy of that age including Huggins, Lockyer, Holden and Pickering; their achievements and their rivalries. The story follows her friendship with William and Margaret Huggins, and her prolific correspondence with eminent astronomers of the time. This biography will fascinate scientists, and anyone who admires intellectual achievement brought about through love of learning and sheer hard work.

Contents.--v.1. History, travel & description.