Marion, Fulgence, Quin, Charles W. (Charles William) · New York : C. Scribner's Sons · leaf 215
207 OTHER OPTICAL ILLUSIONS. image of the objects to be looked at. This mirror sends the image downwards to another placed diagonally at c, a third being placed at D, and a fourth at B. The … Fig. 59.— How to see through a Brick. horizontal ray, meeting the mirror at A, is consequently bent downwards to c, then travels horizontally to D, when it is reflected upwards to B, in which it is seen by the eye. Of course a simple tube without any lenses at all would serve the same purpose, but…
Optics · Physical optics · Optical illusions
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
