An introduction to perspective : practical geometry, drawing and painting : a new and perfect explanation of the mixture of colours, with practical directions for miniature, crayon, and oil painting : in a series of familiar dialogues between the author's children, and letters addressed to his pupils : illustrated with numerous wood engravings, from drawings by John Hayter ..., and coloured plates (1845)
Hayter, Charles, 1761-1835, Hayter, John, 1800-1895 · London : Samuel Bagster and Sons ... · leaf 33
aper : thus geometry re- wards the ingenuity of mechanics. Try it, and prove it. Eliza. Here is another leg with a joint in it d; what is that at the other end of it, with a little screw ? George. That is a steel drawing pen, to place in the com- passes after the pencil outline is correct; and you… … George. You appear perplexed at this in- strument: come, I shall soon relieve you; it is called the sector , and is particularly useful in many points of mathematical in- quiry, but almost entirely useless in the practice of perspective : yet I hope you will find opportunity for learning the use of…
Perspective · Drawing · Color · Painting
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.