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เนื้อหาย่อ : This, the Seventh Edition of Mechanical to meet these changing requirements. suitable for use in drafting courses Drawing, is completely rewritten. The Chapter 24, "'Graphic Charts and Dia- such as: basic plan and purpose have been grams,'' is included because of the 1. Basic courses of one, two, o three years adapted to meet the changing needs of extensive use of graphic charts, this important and growing subject. models, and mock-ups. Chapter 25, 2. Pre-engineering course The continuing interest, advice, and "'Functional Drafting,"' is needed to 3. Industrial arts courses 4. A general survey course assistance of the long line of prog- explain the meaning of a term which ressive instructors who have used is related to simplified drafting and has 5. Machine drawing 6. Architectural drafting Mechanical Drawing over the years important applications. The greater use are responsible for many of the im- of pencil drawings in industry sug- 7. Technical institute courses portant improvements. gests less emphasis on inking practice; 8. A course for training draftsmen The authors wrote the first edition hence, inking is covered in a brief, As was true of previous editions, this of Mechanical Drawing to help students separate chapter. The treatment of Seventh Edition reflects the benefit o learn to visualize in three dimensions, architectural drafting has been en- actual use. Additions and improve to develop and strengthen their techni- larged and provides necessary material ments have been suggested by today's cal imagination, to think precisely, to for separate instruction. progressive instructors. Conformity with read and write the language of the Chapter 26 includes a variety of industrial and engineering practice has industries, and to gain experience in problems which apply to courses of been provided by information, material making working drawings according different content, difficulty, or length. and criticism from many companies. to modern commercial practice. These There are a great number of new prob- Credit and appreciation is here ex continue to be the objectives of the lems and many revised problems. pressed to the author's friends, the Seventh Edition. Most tried and true problems in previ- instructors, for their professiona A larger page size is used to provide ous editions which have proven value assistance which makes it possible tc for better illustrating and more effi- have been retained. The problems have meet the greater needs of today's cient study. The use of a three-column been arranged in groups and numbered courses in engineering graphics anc format permits the placement of to correspond with the chapters to mechanical drawing. Special credit is illustrations near the descriptive text. which they apply. In each group the due the many companies who have Illustrations are numbered to identify problems have been numbered con- cooperated so freely in so many ways them with the article in which they are secutively and the problem statements Sincere thanks are here expressec described. Color is used throughout placed under or close to the problem to all who have done so much for this the book to provide emphasis and illustration to make assignment and and previous editions. In particular clarify basic principles. Careful re- identification definite. Suggestions for special thanks for major contributions search has been done to adapt the the selection of problems are given at are due to Mr. Herbert Brasher, Mr text and problems to changing courses the ends of the chapters in graded lists Peter Buban, Mr. Douglas Ross, and to of study, revised standards, and the for convenient use in helping a to Mrs. Catherine Givens for untiring care latest practices in the engineering organize courses to meet different in preparing the manuscript and ir drafting rooms of progressive in- requirements. checking proof. Instructor's comments dustries. New chapters have been The content and arrangement of text and suggestions are always welcome added and others have been revised and problems are such that the book is and appreciated.