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214 AMATEUR TALKING PICTURES
of amateur cinematographers. It is now possible to have a strip of film made into a book suitable for carrying in the waistcoat pocket, so that one can carry a permanent record of a particularly good shot. This enables one to "show off " to one's friends without the necessity of taking them home and setting up the projector.
It is a fairly general principle that no entertainer is ever immensely popular when it restricts the number taking pleasures at the same time. This was probably one of the reasons for the decline of Edison's early peepshow "Kinetograph." Radio would not have attained its present magnitude had headphones always been necessary. For a good many years writers have been commenting upon the future "talking book." As a matter of fact the talking book is not a difficult accomplishment, and the writer has seen one of these in action. Actually it was an adaptation of the Mill's sound-system previously described. The book consisted of a series of leaves of the "flip" type which were clipped on a bracket on a gramophone. The turntable in revolving released so many pages per revolution after the style of electrical contact-making described previously. The effect was really good and presents possibilities, although in view of the possible cheapness of sound-on-disc operating on the same system it is doubtful whether the "talking book" of this type will ever become popular.
This brings us to another subject. In Fig. 91 we see the "Moviola" film viewing and sound reproducing machine. This is an apparatus employed in reviewing and editing sound films before they are released to the cinemas. In the early days of sound films editing, etc., took place through the medium of a standard type of reproducing mechanism. This had obvious disadvantages amongst which was the heaviness of the moving parts. The mechanism as shown in the illustration consists essentially of sound-on-nlm equipment complete. Instead of using a screen, viewing takes place through the large lens. It is possible that a miniature machine of this type might be employed for home purposes in which "viewing" took place of "projecting." Obviously a mechanism of a similar type might be also employed for sound-on-disc, indeed, one might press the