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.
178 The Audio-Visual Handbook
fears and proceed with reasonable assurance that any up-to-date equipment installed this year or next, or during the next several years, will be extremely useful for many years to come. The development of the motion picture and its subsequent use among schools has not caused a decrease in the use of still pictures in education. The rapidly increasing use of radio in education has not caused a decrease in the use of phonograph records. On the contrary, each new development seems to validate the potential values of earlier developments and cause those older types of audio-visual aids to become more important in the classroom. Similarly, it is expected that the development of television, however rapid or delayed it may be, will but serve to increase the educational importance and use of all types of audio-visual aids among schools.
Facsimile
Facsimile is not a new art, but recent developments have brought it into prominence as a potential teaching tool of considerable promise. One of the first patents was recorded in 1842 by Alexander Bain. However, it is new as far as the general public is concerned, and as far as what we mean today when we mention facsimile.
Facsimile is the replica, or the reproduction, of an original. A facsimile reproduction of a legal document is legal — a signed check transmitted by facsimile is legal. Facsimile was first used in a slightly different form commercially, known as radio photo. Then it progressed into the wire-photo service — the pictures were distributed by telephone methods. Those systems are basically facsimile systems, but the equipment was designed for further reproduction. The facsimile of today is a broadcast receiver and is not designed for reproduction. It is a final picture or product. It is a very interesting device and, like a great many other scientific devices, its actual value will depend upon the ingenuity of the various groups using it.
Technically, the basic system consists of sending and receiving instruments. The sending equipment utilizes the photo-electric eye to scan in an orderly fashion all the line elements of a page of material placed in the scanning machine. As the scanner passes over a given point at a given time it receives more or less reflected light, depending on whether the subject matter is black or shades of gray or white. It transfers these light variations into electrical impulses which are amplified by conventional amplifiers and passed to a transmitter similar to those used for transmission of voice or music.