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THEORY AND PRACTICE
WITH CHAPTERS ON
A TEXT-BOOK FOR TECHNICAL, NORMAL, SECONDARY
TRADE AND VOCATIONAL SCHOOLS
CHARLES WILLIAM WEICK, B. Sc.
in the City of New York
REVISED WITH AN ADDITIONAL
CHAPTER ON SKETCHING
Lecturer in Drawing and Design in Teachers College, Columbia
York City, Assoc. Mem. A.S.M.E., Mem. A.A.A.S.
MCGRAW-HILL BOOK COMPANY, INC.
COPYRIGHT, 1915, 1925, BY THE
PRINTED IN THE UNITED STATES OF AMERICA
THE MAPLE PRESS COMPANY, YORK, PA.
The revision of this book was undertaken at the request of the publishers with the intent of having the text and problems conform to the recent developments in teaching the subject. This has been deemed particularly desirable in view of its extensive use by normal and teachers' institutions.
Besides the new chapter on sketching, the important changes occur in the chapters devoted to lettering, projection and mechanical drawing practice. The original scope and purpose of the book as planned by the author have not been disturbed and where possible his arrangement of the subject matter retained.
The chapter on projection has been rewritten and divided into two parts. Part I covers the rudiments of the subject in a concrete way, and can be assigned early in the course. Part II deals with the more theoretical aspects. The introductory plates of the section on drawing practice are different, both in form and method of approach. The line exercises have been supplanted by simple, practical objects, yet affording the necessary elementary practice in the use of a limited number of drawing instruments. The gradual introduction of geometrical applications and conventions in the plates follows, replacing the theoretical problems dealing with abstract lines and solids in revolved positions. Occasional problems to be drawn from pictorial views and details form a desirable variation from the layout-example type of presentation. Allotted time statements are omitted.
The chapter on sketching is a departure from the traditional chapter of that name. Only the minimum space is devoted to the description of materials and the technique of sketching. Rather, it presents an abundance of material in the form of exercises of a wide variety, providing the needed drill in visualizing and the arrangement of views. While it supplements the chapter on projection, it is written independently and may pre cede it.
Sincere appreciation is expressed for suggestions made by members of the mechanical drawing departments of Teachers College and Stuyvesant High School where much of the new material has been carefully developed and used in the course of study. Especially, the helpful criticisms of the manuscript by Mr. Thomas Hingsberg of Stuyvesant High School and Mr. Ralph Breiling, now of the Brooklyn Technical High School, and the valuable assistance of Mr. Robert G. Jahelka in reading the proof are gratefully acknowledged.
F. C. P. NEW YORK, August, 1925.