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140 AMATEUR TALKING PICTURES
library in the world, consisting of hundreds of up-to-date full length subjects printed down from standard film.
Fig. 67 shows the two cabinets which house the Pathegram apparatus. That at (A) contains the turntable and 9-5 mm. projector which are driven direct by a double field governed motor, no flexible shaft being used. When the cabinet lid is lowered turntable and projector sink flush, and the cabinet assumes normal appearance. At (B) is the other cabinet containing loud speaker and amplifier, and providing support for a 4 ft. screen. The amplifier is included in the circuit of a 7 valve superheterodyne radio set. The volume provided is adequate for a small hall with a seating capacity of about one hundred persons.
Thus we see Pathegrams equipment consists of two cabinets placed at opposite sides of a room, and connected only by wire flex which can be concealed. Everything is always ready for working, yet always concealed. The arrangement from the point of view of home entertainment is ideal. Cabinet (^4) costs 185 dollars and (B) 75 dollars, less valves.
Western Electric 16 mm. Disc Equipment. Fig. 68 shows the 16 mm. sound-on-disc equipment of the Western Electric Co., which company did much of the work involved in the development of the talking picture itself, equipping the major part of the film industry. The 16 mm. apparatus is on a parallel with their 35 mm. as regards quality, but the price is high, as might be expected. Two cases accommodate the equipment, the projector and turntable being combined into one unit, and the amplifier and loud speaker into another, as seen in the lower illustration. The construction is robust, and it is possible that an equipment of this type may become standard for educational work if the position is not usurped by sound-on-film equipment as described in the next chapter.