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 77
through 2; with 3 as centre and 3 ^ asradius draw arc^ // to strike a line from 4 through 3 andso continue until the spiral is completed. In a spiral of one turn the diameter of the eye is about 70 GUIDE AND ASSISTANT three-tenths of the length of the greatest diameter; in oneof two turns, about… … parts and from point 4 draw a line at right angles to a b;at any point on this line draw a circle whose diameter isequal to one of the divisions on a b. Draw the square abc d; bisect each of its sides and draw the square e \2 w f;drav/ the diagonals e 11, /12; divide the diagonal 12 / intothree…
Carpentry
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