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Handbook of projection for theatre managers and motion picture projectionists ([1922])

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918 HANDBOOK OF PROJECTION FOR 231 — How may clock be made plainly visible without being a glare spot? 238-239 232 — How may exit signs be made conspicuous without being glare spots ? 239 233 — Is fact that no one complains of glare spots proof that they are doing no damage ? 239 Flicker 233a-To what is flicker due ? 613 234 — Is there any excuse for flicker due to opening and closing of projection lens by revolving shutter? 235 235 — Explain action of flicker upon the eye 235-236 236 — Is flicker due to wrong procedure in projection? 235 237 — Does brilliancy of screen surface effect flicker? 235 The Film 238 — Exactly of what does a film consist ? 268 239 — Describe the process of its manufacture 268 240— What is standard thickness of film ? 269 241 — What are standard perforation and film dimensions? 269 242 — Name a few of the more prolific causes of damage to film 270 243— What is "rain"? 271 244 — Name one chief cause of "rain" 271 245 — Name chief causes of damage to sprocket holes 271-272 246 — Should film repairing be done by anyone other than a thoroughly competent person ? 272 247 — To what is damage to film in passing through projector mostly due ? 272 248 — What troubles may badly matched sprocket holes cause? 273-275 249 — In what way may projectionist increase the tendency of emulsion to deposit on tension shoes? 273 250 — Do poorly made splices do harm ? 275 251 — Should splices be made with the unaided fingers? 277 252— What is correct width of film splice? 277 253 — What is of immense importance in the making of a splice? 278 254 — What is the greatest fault found in film splicing?.... 279 255 — How may film be measured as to its length ? 292 Film Inspection and Repair 256 — What repairs should projectionist make on film? 286 257 — Does price exhibitor pays for film service include inspection and thorough repair of film ? 286 287 258 — Should projectionist be paid extra for time employed in inspecting and repairing films received from exchange in bad condition? 287-288 259 — Describe the usual exchange "inspection" 288