Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 19
has objections which overbalance that con-sideration. 6.—A T-square of mahogany, at once simple in its construc-tion, and affording all necessary service, may be thus made.Let the stock or handle be seven inches long, two and a quarterinches wide, and three-eighths of an inch thick: the… … Fig. 1. INTRODUCTION. » 7.—The set-square is in the form of a right-angled triangle ;and is commonly made of mahogany, one-eighth of an inch inthickness. The size that is most convenient for general use, issix inches and three inches respectively for the sides which con-tain the right angle;…
Carpentry · Architecture
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