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.
216 AMATEUR TALKING PICTURES
argument further and use headphones which would eliminate the necessity for multi-valve amplifiers.
All this is possible, though admittedly visionary and of problematical advantage. However, one point is raised, and that is the use of paper strip instead of celluloid for film purposes. There are few things in this world cheaper than paper, and the adoption of a paper type of film might greatly aid amateur talking pictures.
As a matter of fact the use of paper strip for recording soundon-film system has been adopted by the Austrian Selenophone Co. The apparatus known as the "Selenophone" is not at present designed for projecting apparatus pictures, but is intended to replace the gramophone. It employs instead of either celluloid for a sound track or gramophone records for discs a strip of paper \ in. wide in lengths of 300 metres. On this strip of paper are printed four sound tracks side by side running at a standard projection speed. A 300 metre drum gives some 70 minutes performance equivalent to about ten double-sided records. Another interesting feature of the arrangement is, that although the sound is recorded in the first place by photographic means it is reproduced by a process analagous to paper printing. Thus from the photographic sound track is made a metal plate and finally a rubber "Blanket " which is used as a printing roll much after the style of the machinery used for daily newspapers.
In our previous considerations of sound-on-film the light from the exciter lamp has been projected through the film on the photo-electric cell. In the Selenophone arrangement, however, the light is reflected, since obviously the paper is opaque. A little consideration shows this principle might possibly be adopted for other sound-on-film work. For the sake of argument we might make a 16 mm. film on an opaque base with both track and picture operating by reflected light. In this connection readers will remember the use of the old time "Mirroscope" which took the place of the magic lantern, and enabled picture postcards to be shown upon the screen. We might even run an opaque medium in which the picture was printed on one side and the sound track on the other, light being applied in both