CHAPTER XII 

 PROJECTION ROOMS AND SCREENS 



600. Apparatus and Materials for Chapter XII: 



1. Room which can be made entirely dark, or which can be 

 partly lighted, depending on the kind of projection and the 

 radiant. 



2 . If for exhibitions, the room should have plenty of aisles and 

 exits, and there should always be lights (red lights) near the exits, 

 and these lights should be independent of the projection circuit. 

 The room should be well ventilated, and of a form found suitable 

 for audiences, e. g., like a church, theater or university lecture 

 room. The room should be tinted and decorated with light-absorb- 

 ing colors ( 604). 



3. The lantern or other projection apparatus should be so 

 placed that it does not interfere with the audience ( 612-620). 



4. Special room for the projection apparatus. If in a moving 

 picture theater, there should be a fire-proof room for the apparatus. 

 This should have a large ventilator extending through the roof or 

 side of the building ( 556-5 57). 



5. Screen upon which the images are projected. This should 

 receive the image at right angles to avoid distortion (fig. 241), and 

 be of sufficient size for the room ( 633). 



601. For the historical consideration of rooms and screens 

 see under history in the Appendix. See also the works referred to 

 in Chapter I, 2, and the catalogues of manufacturers of projection 

 apparatus and materials. Periodicals on moving pictures like the 

 Moving Picture World; F. H. Richardson's Motion Picture Hand- 

 book; and F. A. Talbot's Moving Pictures. 



602. Suitable room for projection. Any room which can be 

 darkened may be used for projection, but to be satisfactory it 

 should have the qualities of a good auditorium. 



(1) There should be plenty of aisles and passages, so that the 

 auditors can easily reach their seats. 



(2) There should be plenty of exits, so that the room can be 

 quickly and safely emptied. 



(3) There should be plenty of fresh air. 



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