Servicing projection equipment (1932)

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102 FLICKER mittent shifts the film a shade more slowly and at fractionally longer intervals. The persistence-ofvision effect is now destroyed. Once a proper balance of all the elements has been obtained at the correct projection speeds, it is best not to drop the projection speed to a point where the flicker shows. If the speed is dropped, there is no remedy except a complete readjustment with a probable disorganization of the conditions at greater speeds.