IRREGULAR PROFILES FORMING SYMMETRICAL SHADOWS.
Nearly everybody has at some time been struck by the strangely accurate shapes made by the shadows cast by the edges of a pile of irregular formation, such as a heap of books, &c.
Fig. 129.
Fig. 130.
The heads of pipes, sword-hilts, umbrellas, and canes can be turned into shapes unrecognizable as at all human, yet giving a shadow, of which the outline reproduces the profile of some eminent man.