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.
888 HANDBOOK OF PROJECTION FOR
results ; (n) knowledge of optical principles involved in the revolving shutter of the projector, including how to make a shutter fit local conditions as nearly as it can be made to do so; (o) knowledge of proper storage of films in the projection room; (p) knowledge of proper projection room lighting and its effect on projection; (q) knowledge of screen surfaces and their effect in auditoriums of different dimensions; (r) knowledge of proper picture size under various conditions, the effect of seats being placed too close to the screen; (s) knowledge of how to measure focal length of lenses; (t) knowledge of proper selection of and adjustment of the various elements of the projector optical system, and such other things as may occur to the examiners, not overlooking the cause of damage to film in re-winding and how to minimize it, and the various effects of overspeeding projection.
COMPETENT EXAMINERS.— Up to date what is perhaps the worst trouble in the whole licensing proposition is that very few examiners are themselves equipped with the knowledge necessary to conduct a really competent examination. Also, few examining boards are supplied with the equipment necessary to the conduct of a competent examination. We might add that the issuance of licenses except to men who have successfully passed a really competent examination savors of dishonesty to the public; moreover, it savors of highway robbery to compel a projectionist to pay a fee for a license which is issued as the result of an examination having little or no practical value.
ROUGH DRAFT OF LICENSE LAW.— It would be impractical to include a model law in this book, because of the difficulty in, framing one which would, in all its details, be applicable to varying local conditions. Fundamentally such a law should be the same in any locality, and the fundamental principles involved I shall set forth, leaving the necessary details to be worked out to fit individual local needs.
(1) Designate places in which it shall be illegal to display motion picture films until the projection apparatus and the projection room have been approved and duly licensed. Name the licensing power and give it authority to make necessary rules and regulations and to enforce them.
(2) Provide for an examining board, for the necessary equipment and for the examination. Specify briefly the qualifications necessary to obtain such license, which must include a competent knowledge of projection optics, the pro