The principles of perspective as applied to model drawing & sketching from nature (1890)
Trobridge, George, 1851-1909 · London : Cassell · leaf 38
34 THE rnJNGTPLES OF AS APPLIED TO part of the curve will divide it into two equal In any other position a circle will assume the form of an ellipse, wider or narrower as its and similar parts ; and a line bisecting this at plane is inclined more or less to the eye. In right angles will also cut… … F E F, Fig. ]7)j and, keeping it always tense, draw the D Fig.l7. curve around the pins. This line will be an ellipse, and order to draw the cvn-ve correctly it is necessary- the pins will he its foci. By putting the pins further to study the natm^e and character of ellipses. apart the ellipse will…
Perspective · Drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
