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 66
diameter, Fig. 78, as a b; then half the short di-ameter, as c d; then, with c as centre and a d 2iS radius,describe arcs bisecting a b ^i i and 2, at which points drivea nail to fasten the string; then fasten the string at i andstretch to c, at which point place a pencil inside the stringand carry… … Q L>. 74—To Draw an Ellipse with the Square.—Take a strip of wood, as shown in Fig. 79, say %^i, to use asa rule; then drive a nail through the stick about an inchfrom one end, as i; then m.ake the distance between i 2 6o GUIDE AND ASSISTANT equal one-half the short diameter of the ellipse and 2…
Carpentry
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