This book is the result of several years teaching of blueprint reading in night schools and several years teaching of drafting preceding used for three years in blueprint and mimeographed tried out. In it. The material was form. In this form it was thoroughly preparing it for book form the drawings have been carefully redrawn and the text improved upon as ex- perience suggested to be desirable. Essentially it is, however, a tried text, one that has been used to teach the reading of drawings to one class of mixed trades, one class of ship carpenters, two classes of house car- penters, and one class of machinists. It has been designed to suit as wide a range of trades as possible. Usually each new principle is illustrated by example. both a machine and an architectural In recognition of the principle that we learn by doing a number of drawings are included to give practise in reading. At the end of each chapter a number of questions are placed, a few for the purpose of re- view, but...

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