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Feb., 1930] PROGRESS REPORT 225
during the summer of 1929 as the bulk of pictures made were allsound pictures or contained sound sequences. Tinted films for sound positives were described by Jones at our spring meeting.1 These films have the base tinted with dyes which transmit light capable of exciting uniformly the photo-electric cell thus avoiding a fluctuation in the volume level during a change of tint which occurred with some of the older tinted bases. A patent has been granted on a film base suitable for sound motion pictures having a substance in the base rendering it translucent.2
A marked increase in the use of film emulsions for color motion pictures has occurred during the past six months. Many entire features in color and sound have been announced, a number of which have been released, notably, On With the Show which required about 350,000 feet of negative film in the making.3
The most radical advance since the advent of sound is the impending adoption of wider film. This has apparently been a result of (a) the introduction of processes designed to give pseudo-stereoscopic effects, and (6) the need for a larger picture when screening large musical stage settings. Three processes have been announced, namely, the Spoor Natural Vision process4 which uses films 63.5 mm. wide, Magnafilm,5 which uses a film 56 mm. wide, and Grandeur which employs a film 70 mm. wide. The Spoor system is capable of projecting a picture 70 feet wide although a screen 52 feet wide by 30 feet high was used in the demonstration. Magnafilm for which stereoscopic effects are also claimed was demonstrated in New York at the Rivoli Theater on July 25th, the screen used being 40 feet wide by 20 feet high.
A sound newsreel (sound-on-film) and a feature picture made on Grandeur film opened at the Gaiety Theater, New York, September 17th and was favorably received.6 A screen of 40 feet overall width was used which fills the proscenium arch.
Another method of securing larger pictures which has many commendable features is the Fear process.7 This uses standard 35 mm. film and photographs the picture lengthwise instead of across the film by means of a special optical system which rotates the image through 90 degrees, a similar rotation also being necessary on projection. A longer sound track per picture frame is a feature of this process.
Westerberg8 has analyzed several of the suggestions for wider film and warns against the confusion which may result if several film sizes