A text book of geometrical drawing : abridged from the octavo edition : for the use of schools in which the definitions and rules of geometry are familiarly explained, the practical problems are arranged from the most simple to the more complex, and in their description technicalities are avoided as much as possible : with an introduction to isometrical drawing : and an essay on linear perspective and shadows ... (1849)
B DF M F,-y … yr- Wmfij,. I TLbiiaji kSoru PLATE XLVIII. 143 Figure 3, To draw the Shadow of a Cylinder upon a Vertical Plane, Rule.—Find the position of the shadow at any num-ber of points. 1st. From A where the tangental ray (at an angleof 45°) touches the plan, draw the ray to W, Xy andfrom the intersection…
