Scientific American February 13, 1909. 132 … is impregnated with alum or calcium acetate. tors being in the open air. A current of from Fig. 2.—Projection cabinet, Cinema Palace. Fig 4.- Poch's apparatus for demonstration* Fig. 3.—Moving pictures visible in daylight. and then, immersed in a 7 to 9 amperes per square fixing bath containing…
Apparatus · Camera · Surface · Motor · Water · Ground glass · Scientific American · Small country · Peerless rubber · Wet grain · Water power · American supplement · Small house · Pinar del · Water glass
Internet Archive · Public domain (published before 1931). Free to use for anything.
