Fig. 1. Stereoscopic photographs made in pairs and viewed in the stereoscope give an increased reaUty to the thirdchmension. A similar effect is produced when a single pictme is viewed with one eye through a conical^tube,or thiough the closed hand. … Actual DfiAw/NqON Pictu/^e: Plane: Fig. 2. 5. Referring to Fig. 2, A, we have a cube ABCD-H resting on the right end of the top of a table OPQ.Let the eye be placed at E and interpose a transparent piece of glass KLMN between it and the cube. The 7 cube is visible to the eye, because light is…
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
