WORKS BY D. A. LOW. AN INTRODUCTION TO MACHINE DRAWING AND DESIGN. With numerous Illustrations. Crown 8vo, 2s. "One of the best little books on the subject we have met with; and students and apprentices will find it an excellent guide in their efforts to master machine drawing. Mr. Low is a successful and experienced teacher, and this little work gives evidence of his skill and of his intimate acquaintance with modern engineering practice. -Mechanical World. TEXT-BOOK ON PRACTICAL, SOLID, OR In Two Parts. Crown 8vo. Part I., 28.; Part 11., 38. "A handbook which should be on the shelf of every engineering or architectural draughtsman. Not a carpenter and joiner, not a workman in any branch of mechanism, but would profit by a perusal of this work.' -The Schoolmaster. "The definitions and explanatory matter throughout merit some notice for their clearness and simplicity."Journal of Education. "Mr. Low seems to us to have done his work with great clearness, fulness, and method. He has, it is evident, sound ideas as to the methods to be pursued by the student who would obtain a practical knowledge of his subject."-The Saturday Review. IMPROVED DRAWING SCALES. Printed, from carefully engraved plates, on strips of thin cardboard, and varnished. Fourpence per Set, in Case. LONGMANS, GREEN, AND CO. AN ELEMENTARY TEXT-BOOK OF APPLIED MECHANICS. With numerous Illustrations. F'cap. 8vo, 28. "Mr. Low has produced a work that, as an elementary treatise on this subject, is unequalled."--Mechanical World "We commend it highly for its clear and concise arrangement and method of exposition, and for the large number of well-chosen examples which are to be found in it."-Industries. BLACKIE AND SON, LIMITED. (WHITWORTH SCHOLAR), M. I. MECH. E. HEAD-MASTER OF THE PEOPLE'S PALACE DAY TECHNICAL SCHOOL, LONDON AND ALFRED WILLIAM BEVIS (WHITWORTH SCHOLAR), M. I. MECH. E. DIRECTOR OF MANUAL TRAINING TO THE BIRMINGHAM SCHOOL BOARD SECOND EDITION LONDON LONGMANS, GREEN, AND CO. AND NEW YORK: 15 EAST 16th STREET 1894 All rights reserved Eng TC L95 636017 сл 6822343 PREFACE. In this work the authors have attempted to provide:-(1.) A large number of dimensioned illustrations which may serve as good drawing examples for students, examples ranging in difficulty from the simplest machine detail to a set of triple-expansion marine engines. (2.) Illustrations and descriptions of a great variety of machine details, which may assist the designer in selecting the form of detail best suited to his purpose. (3.) Many rules and tables of proportions, based on scientific principles or on numerous examples from actual practice, which may be useful to the experienced designer for the sake of comparison with the results of his own practice, and which may, to some extent at least, take the place of the well-filled notebook and collection of designs usually possessed by the experienced designer, but which the young engineer or draughtsman can scarcely be expected to have. (4.) Numerous examples showing the application of the principles of mechanics to the calculation of the proportions of parts of machines. The illustrations given are very numerous, and they have all been specially prepared for this work from working drawings, and the authors have been at great trouble to obtain examples representing the best modern practice in machine design. The authors would here acknowledge their great indebtedness to the many engineers and engineering firms throughout the country who have generously given them drawings and much valuable information, which they feel sure will prove useful to students, draughtsmen, and engineers. They would also record their indebtedness to the leading engineering papers, and to the published Proceedings of the various engineering societies, English and American, for particulars of examples of modern practice, which they have either incorporated directly, or have made use of in drawing up the numerous rules and tables which occur throughout the work. In the introductory chapter, besides several brief articles on drawing appliances and the making of working drawings, there is a collection of problems in practical geometry which are very often required in machine drawing; but the student must not imagine that the amount of geometry there given is all that he will require; in fact, as machine drawing is simply the application of practical geometry to the representation of machines, it is evident that a thorough knowledge of the latter subject will be of immense advantage in the study and practice of the former. |