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THREE-DIMENSIONAL MOTION PICTURES 23 probably another 7 /8 of an Inch will be added. A heavier gauge steel will have to be used in manufacturing these magazines, as the loaded weight for the reel on these new systems is approximately 28 pounds. There is also talk of a change in the size of the diameter of the reel shafts from the present 5/16" to one-half inch. The exhibitor will require four new magazines, besides a number of the large 23 inch reels. The cost of these film magazines will be known just as soon as manufacturers decide upon specifications and their manufacturing costs can be approximated; probably about $50.00 a pair. One projector manufacturer has stated that the old ERPI Universal Projector Base cannot be used where these large oversize magazines are installed, and that theaters still using this type projector base will have to purchase a new base. However a rather novel suggestion has been advanced by our old friend Joe Cifre, of the Joe Cifre Inc. Supply House, of Boston, Mass. He suggests that the new oversized take-up magazine be installed at the rear of the projector, in the space that was originally used for the sound turn table. The film is threaded into the old takeup magazine through the fire-valve and an additional valve is cut in this old magazine, then through a film shute into the valve of the new 25 inch take-up magazine. This may be better understood by reference to the rough sketch, which Joe Cifre sent us with his suggestion. We understand that a great number of these old type bases are still in use, especially in New England, and this suggestion will probably be welcomed by the exhibitors in that territory. In the Natural Vision system and other systems using two projectors running simultaneously, some