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320 SOUND MOTION PICTURES
will be awakened to a new interest through the opportunity of hearing and seeing the really great ministers and religious leaders, a privilege which may have the tendency to replenish many shrinking congregations.
Through talking pictures, again, revolutionary changes will be brought about in the handling of political campaigns. Already we have seen the talking picture used in connection with the last national political campaign, when President Hoover and Governor Smith spoke through this medium to thousands of audiences throughout the country. In such campaigns the participants will speak in screen person to all the voters simultaneously, without the discomfort and physical exhaustion of the past. Incidentally, this means that future generations will not only see but hear the great characters of this period, and of others to come, because here is a new means for recording history. It can be imagined what it might mean to the youth of to-day, for example, were they able to see and hear Lincoln delivering his immortal Gettysburg Address.
Yet the step which will provide the widest scope to all these will be taken when special sound equipment in connection with motion pictures is installed in private homes. A small suitcase apparatus, one of the latest developments of the Bell Laboratories, is a complete sound system. It includes a projector, which uses standard Movietone film. An even simpler and less expensive device has been made available by the introduction of a home projector with a synchronizing unit, in which 16 mm. films are used. The apparatus is known as the DeVry Cinetone, and consists of a phonograph turntable mounted on the same base with a 16 mm. projector. The turntable is geared by shafting direct to the mechanism of the projector, so that the two may be in synchronization. The reproduction of the sound on the phonograph record is electrical, so