Phonograph, 130–132, 140, 146, 154, 159, 173, 174. Photo-gun, 116, 122, 125, 145, 173. Photobioscope, 172. Photograph projection, 105–114, 121, 134, 142. Photographic Pellicle, 174. Photography: color, _see_ Color Photography; dry plate, 116; motion, _see_ Motion Photography; motion color, _see_ Motion Color Photography; wet plate, 112, 120. Photophone, 146. Photoscope, 146. Physiological Park, Marey’s, 125. Pipon, 176. Plateau, Joseph Antoine Ferdinand, 85–97, 102, 104, 109, 115, 122, 130, 161, 170. Plateau-Stampfer Magic Disks, 93–96, 98–100, 108–110, 113, 116, 121, 123, 126, 128, 137, 142, 170, 171, 173. Pliny, 32, 163. Porta, Giovanni Battista della, 36–45, 47, 48, 148, 161, 166. Praxinoscope, 124, 147, 174. Prestwich, 176. Prince, Louis Aimé Augustin Le: _See_ Le Prince, Louis Aimé Augustin. Projection: color, 66, 69, 96, 101, 153, 159; motion, 68, 70–75, 89, 92, 98, 102, 109, 112, 117, 121, 127, 128, 130, 136, 139, 140, 149, 152, 171–176; photograph, _see_ Photograph Projection; slide, _see_ Slide Projection; film, _see_ Film; light sources, _see_ Projection Light Sources; rear, 148; screen, 10, 11, 40, 92, 98, 104, 121, 123, 132, 134, 147, 148, 154–159, 176; three-dimensional, 65, 109–111. Projection Lenses: _See_ Lenses. Projection Light Sources: candle, 54; electric arc, 144; gas lamp, 108, 169; Geissler tube, 127, 128, 147, 174; hydrocarbon lamp, 99; oxyhydrogen light, 101, 146, 171; sun, 55, 144, 167, 175; table lamp, 67, 73, 124. Projection of Motion: _See_ Projection. Projectors: 15, 104, 129, 139, 149, 163–176; Acres, 154; Anschütz, 146, 147; Armat-Edison, 158–160; Armat-Jenkins, 155, 158; Chales, de, 65; Demeny, 146; Edison, 135–137; _see also_ Vitascope; Gaumont, 146; Greene, 143; Greene-Rudge, 142, 175; Heyl, 113; _see also_ Phasmatrope; Jenkins; _see_ Armat-Jenkins; Kircher, 53–55, 59; _see also_ Magic Lantern; Latham, 157; Le Prince, 141; Lumière, 150, 151; Marey, 144, 145; Muybridge, 128; _see also_ Zoopraxiscope; Paul, 152, 153; Reynaud, 123, 147, 148; _see also_ Praxinoscope; Rudge, 141, 142; Schott, 63; Uchatius, 100–102; Zahn, 67. Prokesch, W., 102. Proszynski, 176. Ptolemy, 21, 22, 26, 164. Q Quetelet, Lambert Adolphe Jacques, 86, 89, 92. Quinetoscope, 112, 171. R Raff & Gammon, 137, 158, 159. Radio City Music Hall, 66. Rear Projection: _See_ Projection. Reinhold, Erasmus, 165. Reville, 172. Revolving disks, 59, 67, 70, 89, 92, 93, 96, 100, 116, 121. Reynaud, Emile, 79, 123, 139, 147, 173–175. Riley, 176. Ritchie, William, 169. Robert, Etienne Gaspard: _See_ Robertson, Etienne Gaspard. Robertson, Etienne Gaspard, 77–79, 168. Roger, Peter Mark, 86, 87, 94, 95, 169.