F. H. Richardson's bluebook of projection (1935)

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I/O RICHARDSON'S BLUBBOOK OP PROJECTION Footage Capacity of Shipment Reels, page 191 63. What is the most desirable footage capacity for reels: 64. What are the objections the exchanges make to the 2,000 foot reel? 65 Why does the projectionist object to the 1,000-foot reel? How to Estimate Footage of a Roll of Film, page 193 66. Why is it impossible to calculate the footage of a film roll accurately? 67. How can a fairly accurate estimate of footage be calculated? (& How may the footage be calculated with the aid of the orojector mechanism? t Removal of Emulsion, page 194 -« t = 69. How may emulsion be removed from film ? 70. What is the best method for cleaning film ? 71. How is film cleaned with gasoline or benzine? ,, . Rain, page 194 72. What is rain? ^^*&*+ Keep the Films Clean, page 195 73. Is it possible to prevent oil from reaching the film ? Standard Release Print, page 195 74. Of what does the change-over cue consist? 75* Is the dowser operated the instant the change-over cue ap pears on the screen? • 76. How may projectionists make visibility of cue mark easy and certain? . • .■ ■ 77. Of what does the motor-start cue consist?