Richey's guide and assistant for carpenters and mechanics : a work of practical information, giving almost every geometrical and practical problem likely to arise in the work of the carpenter, and quick and easy methods for their solution : the use of the steel square, etc., tables showing strength and weight of materials, methods of framing, useful recipes, etc., etc. (1894)
Richey, H. G. (Harry Grant), b. 1868 · New York : W.T. Comstock · leaf 48
43—To Draw an Equilateral Triangle when thePerpendicular is Given.—Draw a b for the perpendicu-lar. Fig. 46; then draw c d a.nd £ h at right angles to a b;then, with any radius and a as centre, draw the semi-circle, … c e f d; then, with c as centre, find the point e; then, withd as centre, find the point f; then draw the line a k throughthe point f; then draw the line a g through e. 44—To Draw an Angle of 60° or 30°.—Draw theline a b, Fig. 47, and with any point on a b, as c, for cen- 42 GUIDE AND ASSISTANT tre…
Carpentry
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