Young, George, jr, Baxter, Hubert Eugene, joint author · New York, The Macmillan Co. · leaf 153
stretching is too great. Compare with § 115,1.(2) Second jnethod. A method which gives better resultsthan the former, is the construction by means of a trammel i A trammel is a mechanical device for constructing curves by continuousmotion. The term is sometimes applied to beam compasses, though… … mp = ao Pig. 132 to ao and pn equal to »o, pegs inserted at m and n, and a pencilis 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. II. By Estab-lishing Points.(1) First method..In Fig. 133, let aband cd be…
Geometry, Descriptive
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