We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
434 MOVING PICTURE EXHIBITION [Cn. XI
(4) See that the optical parts are clean, and free from dust. See that everything is in line and the light is even on the screen.
(5) See that the objective is in focus.
(6) See that the mechanism is oiled and in good order, no screws loose.
(7) See that the films are properly mended and that there are no misframes.
(8) See that the rolls of film are in the proper order.
The first reel of film is put in the magazine and the machine is threaded.
The arc is either pushed away from the operator so it will not shine on the moving picture head or else the dowser in front of the condenser is let down.
The arc lamp is lighted. When all is ready the crank of the machine is started, the arc lamp pulled toward the operator into position, the dowser is raised, and the house lights turned off all at the same time.
During the exhibition there should be but two things to watch.
1. The adjustment of the carbons. The carbons need occasional attention to keep a good light.
2. The action on the screen. The action on the screen should be very carefully followed. It will serve as a guide to the proper speed to turn the crank of the machine. The lighting of the picture and the focus of the objective may need attention occasionally as can be seen by watching the screen.
If the machine or the film is poor various mishaps may occur and require a short stop.
The most frequent is a misframe. This occurs when a .patch has not been properly made and the pictures not properly matched. The difficulty is remedied by raising or lowering the framing lever. Note the place where the misframe occurs and remove it before the film is shown again. ,
The film may, break. Turn off the light instantly, or push the lamp over to the lantern-slide side or lower the dowser. If a tag end of film is left in the aperture plate, it may catch fire if the light is not turned off. The film is now threaded through the machine