Bench Work in Wood: A Course of Study and Practice Designed for the Use of Schools and Colleges

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Ginn, 1888 - Woodwork (Manual training) - 161 pages
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Page 132 - To proportion the area of each surface to the pressure which it has to bear, so that the timber may be safe against injury under the heaviest...
Page 132 - ... surfaces accurately in order to distribute the stress uniformly. 4. To proportion the fastenings, so that they may be of equal strength with the pieces which they connect.
Page ii - In the Office of the Librarian of Congress, at Washington. TYPOGRAPHY BY JS GUSHING & Co., BOSTON, USA PRESSWORK BY GINN & Co., BOSTON, USA INTRODUCTION.
Page 14 - The two figures representing the length of the two short sides of the triangle, are always given one above the other, and the figure representing the length of the third side, to the right of the other two. 22. A Try-Square is shown by Fig. 31. The beam A in this case is of wood, faced by a brass strip C to protect it from wear. The blade B, at right angles to the beam, is of steel. The graduations on the blade, together with its thinness, make this square more convenient for short measurements than...
Page 10 - ... the United States of America : " Bronze standard of length, No. 11. Malleable iron standard of length, No. 57. At the bottom of each of the two holes near the extremities of each bar is a gold pin, upon which are drawn three transversal lines and two longitudinal lines. The length of the English yard is defined by the distance from the middle transversal line in one hole to the middle transversal line in the other hole, using the parts of those lines which are central between the longitudinal...
Page iii - IX) avoid confusion, the subject herein treated is con-A sidered in three divisions. Part I. contains the essential facts concerning common bench tools for wood ; it describes their action, explains their adjustments, and shows how they may be kept in order. Part II. presents a course of practice by which ability to use the tools may be acquired ; and Part III. discusses such forms and adaptations of joints as will meet the requirements of ordinary construction. It is not expected that the student...

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