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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1872 edition. Excerpt: ...Very great quickness in the bringing of objects within the field of view can be soon acquired. The eye becomes educated to a remarkable keenness of vision by continued praotice. When observations are made with the telescope, or when messages ar.e being received by it by signals, nothing must be taken for granted, and nothing considered as Been, until it has been positively in view, and so clearly as not to admit of doubt. Never presume to anticipate what signals will follow from those already made. A signal must never be considered or announced as read until it has been actually seen. Carefully watch the communicating station until the last signals are made, and be very certain, before ceasing to watch, that the signal for the eud of a message has been distinctly given. The officers at each signal-station must take care that a lookout, through the glass, is kept at each station so constantly that no signal can be shown, at any time, at the communicating station, for more than two minutes without receiving an answer. For this reason, when not at the glass himself, he will cause his men, or any one on duty at the station, to keep a regular "glass-watch," assigning the men by turns, and fixing particular hours for each, that responsibility for neglect may be easily traced. These details will relieve each other every two or four hours, day and night. The watchman on duty must be seated at the glass; and before assuming his station must, with the aid of the soldier last on duty, make certain that he knows the exact position of the observed station, and that it is plainly in the field of the glass. This precaution is particularly necessary at night, when the least movement of the glass may have thrown the station out of view. All...

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Excerpt from A Manual of Signals: For the Use of Signal Officers in the Field, and for Military and Naval Students, Military Schools, Etc Of the great, good results to be hoped from a popular and thorough knowledge of the subjects of the book, subjects hitherto so little treated, that the Author knows of no extended work relating to them, he can here make. Mention only. The character of the possible advantages must be judged after some perusal of the volume. 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.