International Review of Educational Cinematography (Jul-Dec 1929)

Record Details:

Title:
International Review of Educational Cinematography
Date:
Jul-Dec 1929
Publisher:
International Educational Cinematographic Institute
Volume:
International Review of Educational Cinematography (Jul-Dec 1929)
Leaf #:
000426
Language:
English
Collection:
Non-Theatrical Film
Format:
Periodicals
Contributor:
Library of Congress, MBRS, Moving Image Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Description:
Date Added:
September 21, 2023
Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




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.

film and for taking the photograph. Thus the original image is reconstituted by means of the inverse return of the rays of light which served the purposes of registering the view. It is well known how essential the regularity of the action exercised by each of the coloured sections of the tri-coloured screen is in obtaining a successful result and how greatly this regularity depends on the sensitivity of the emulsion. Now there are slight differences in sensitivity between one manufacture and another, but it has been found possible to correct Fig. 4 these variations perfectly by obturating a fraction of one section or of both sections of the screen. With this object, the Kodak Pathe Co. has devised adjustment diaphragms (fig. 4). These diaphragms are adjusted for each film, after testing the sensitivity of the emulsion used, so as to make sure that the action of the dyes and the receptivity of the emulsion correspond perfectly one to the other. Each film should therefore be accompanied by its adjustment diaphragm, which is fixed at the moment of taking the photograph. The sensitive surface covered with the mosaic of the images of the tri-colour screen is printed as it would be through those of the autochrome plate, that is to say that only those rays of the same colour as the screen can filter through these and become impressed on the sensitive surface. These, on being immersed in a development bath, darken at all points that have been printed and black 410