In this the A ge of Machinery, students, apprentices, and machine operators are handicapped by lack of text-books of classified information of the art and science of machine construction. The aim of these books, Elements of Machine Work, Principles of Machine Work, and Advanced Machine Work is to give the beginner the advantages of text-books as in the older subjects, that he may acquire the fundamental as well as advanced principles in a logical, systematic, and progressive manner and in the shortest time possible. Machines, mechanisms, and tools are illustrated graphically by means of original perspective and mechanical drawings, and briefly and systematically described by condensed tables. Operations in machining, standard and typical problems in machine construction are given in condensed schedules which name the material, operations, machines, speeds, feeds, jigs, fixtures, and tools. Calculations are supplied by condensed rules and formulas. Facts and principles are supplied which a student or apprentice in school or shop must rediscover or obtain from instructor or foreman. As the subject is large and varied, it is impossible for instructor or foreman to do justice to it; consequently, the task is a difficult one and the beginners progress extremely slow.
(Typographical errors above are due to OCR software and don't occur in the book.)

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