Endless amusement : a collection of nearly 400 entertaining experiments in various branches of science, including acoustics, arithmetic, chemistry, electricity, hydraulics, hydrostatics, magnetism, mechanics, optics, wonders of the air pump, all the popular tricks and changes of the cards, &c., &c., &c. : to which is added, A complete system of pyrotechny, or, The art of making fireworks : the whole so clearly explained, as to be within the reach of the most limited capacity (1820)
London : Thorp and Burch, and Thomas Boys · leaf 138
133 ENDLESS AMUSEMENT. The Perspective Mirror. A I B … PROVIDE a box, A B C D, of about 2 feet long, 15 inches wide, and 12 inches high. At the end A C, place a concave mirror, the focus of whose parallel rays is 18 inches from the reflecting surface. At I L place a pasteboard, blacked, in which a hole is cut, sufficiently large to see on the mirror H…
