Industrial drawing and geometry; an introduction to various branches of technical drawing (1911)
Spooner, Henry John, 1856- · London, New York [etc.] Longmans, Green, and co. · leaf 87
By Paper Trammel.—Let AB and CD, Fig. 213, be the two given axes at right angles to each other at their centres O. Then if on a strip of paper, or the straight-edge of a card, the semi-axes be markedfrom any point, the strip can be used to find points in the curve in the following way. The strip…
Mechanical drawing · Geometrical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Cosmographia Francisci Mavrolyci Messanensis Sicvli : in tres dialogos distincta, in quibus de forma, situ numerʹoq[ue] tam coelorum q[uam] elementorum, alijsq[ue] rebus ad astronomica rudimenta spectantibus satis disseritur (1543)](https://img.insideoutlibrary.com/img/200/ia-cosmographiafran00maur-162-0.webp)
