Excerpt from Catalogue of the Engineer Department, United States Army: Part I. Subject, Part II. Authors In planning this Catalogue, I have thought it would be better - the Engi neer Department Library being mainly composed of professional books - to arrange similar subjects into groups, and to append a list of the names of authors, rather than to adopt any of the elaborate forms now used for large libraries. Much pains has been taken to place the title of each work in its appropri ate group of subjects, but doubtless there are yet many errors in classification. In the Index to Subjects reference is made in each case to the group in which the subject will be found. In order to find all the works upon any subject it will be well to look through the entire group containing the subject. In this way not only all the special works, but all the general works touching the subject will be discovered. There are, however, exceptions to this rule; 6. G., works important to be consulted in a study of Iron Defenses will'be found in Artillery, Ordnance, etc., and in Metals, etc., as well as in Military Engineering, etc. The lists of additions to the Library, hereafter to be issued periodically, will be in such form that slips, containing the titles of the new books and the names of the authors, may be cut from them and pasted on the blank pages provided fo'r that purpose. 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.

Reprint of the original, first published in 1881.