Page:International Library of Technology - Volume 1B.djvu/11

 heretofore attempted, but they must also possess unequaled value for reference purposes. They not only give the maximum of information in a minimum space, but this information is so ingeniously arranged and correlated, and the indexes are so full and complete, that it can at once be made available to the reader. The numerous examples and explanatory remarks, together with the absence of long demonstrations and abstruse mathematical calculations, are of great assistance in helping one to select the proper formula, method, or process and in teaching him how and when it should be used.

Four of the volumes of this library are devoted to subjects pertaining to shop and foundry practice. The present volume, the first of the series, treats on the following subjects: lathe work, planer work, shaper and slotter work, drilling and boring, and milling machines. The subjects named have been treated from the standpoint of the man running the various tools described, and the text is therefore suited not only to the wants of the apprentice and the journeyman, but meets fully the requirements of the foreman, superintendent, or any one else desiring an intimate knowledge of the operation of machine tools. This volume, together with the others on shop and foundry practice, will prove of great value to all persons engaged in handling, operating, manufacturing, or designing machinery.

The method of numbering the pages, cuts, articles, etc. is such that each subject or part, when the subject is divided into two or more parts, is complete in itself; hence, in order to make the index intelligible, it was necessary to give each subject or part a number. This number is placed at the top of each page, on the headline, opposite the page number; and to distinguish it from the page number it is preceded by the printer’s section mark (§). Consequently, a reference such as § 37, page 26, will be readily found by looking along the inside edges of the headlines until §37 is found, and then through § 37 until page 26 is found. INTERNATIONAL TEXTBOOK COMPANY.