A course in mechanical drawing

Front matter

A COURSE IN

MECHANICAL DRAWING wm$ Romhuon

Copyright }J1

Preface

This course in Mechanical Drawing is the result of a number of years' work with evening classes, and has been evolved from a careful study of the needs of such classes. The course was originally issued in blue-print form, with accompanying typewritten notes. In this form it has been in use at Pratt Institute and other schools, and in Y. M. C. A. classes, for some years. In a modified form it has appeared serially in "Machinery."

The course covers a period of two school years of about twenty-four weeks each. Either two or three evenings a week may be devoted to the work. In the former case it may be found necessary to abridge

November, 192 1 the number of simple working drawings. The first twenty-four sheets constitute the work of the first year, and sheets XXV-XXIX that of the second year.

Because of the interest in Isometric Drawing evinced by pupils, this subject has been added to the present edition. Isometric Drawings — Sheets XXX- XXXII may advantageously follow Sheet XIII in the first-year course.

The exercises given at the end of the book, form a parallel independent course permitting the use of the book as a text-book in class work.

All drawings shown in this book are the work of students.

Louis Rouillion.