Young, George, jr, Baxter, Hubert Eugene, joint author · New York, Macmillan · leaf 155
etching is too great. Compare with § 115,1.(2) Second method. A method which gives better resultsthan the former, is the construction by means of a trammel • » A trammel is a mechanical device for constructing curves by continuouiimotion. The term is sometimes applied to beam compasses, though… … mp = ao Fio. 132 to ao and pn equal to vo, pegs inserted at m and n, and a pencilk placed at p. The pegs being inserted in the grooves betweenthe strips, the motion of the lath will cause the pencil to de-scribe an ellipse,tf...,- II. By Estab- lishing Points.(1) First method.In Fig. 133, let aband…
Geometry, Descriptive
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