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4 E. A. WlLLIFORD [J. S. M. P. E. one of us to do all we can to use as little copper as possible, and to salvage every bit that we can. For some months now we have been using our advertising space to promote the idea of burning carbons at lower current, peeling the copper plating from any butt ends remaining, and saving the copper drippings from the lamp-houses. Many projectionists have been doing this and, in accordance with War Production Board instruc- tions, have turned these peelings and drippings over to scrap dealers, even though the value might be so small that they receive no com- pensation in return. In our own Research Laboratories intensive studies have been given to reducing the amount of the copper plating, and also elimi- nating it entirely, if possible. For the moment, we are producing thinner plated carbons, and as of today, our stocks of the 6.5-mm X 9-inch Orotip "C" negatives of the older standard plating thickness type have been exhausted. Within a few days all other types of carbons with the standard plating will, likewise, be out of stock and shipments thereafter will be of the new thinner plated variety which we have called Victory carbons. The industry is extremely fortunate in that some of our research program over the past few years culminated very recently in the development of a new 8-mm diameter "Suprex" positive. Even with the Victory plating, these carbons will give the same light on the screen as the old carbons with 5 amperes less current and with approximately 20 per cent saving in carbon consumption. At 65 amperes, which is the maximum current for both the old and the new Victory carbons, the screen light is considerably greater and the carbon consumption also is considerably less. In the case of the 7-mm positive—6-mm negative combination, it will be necessary to reduce the current on these carbons with result- ing loss in screen light. The amount of this reduced illumination is only about 15 per cent, however. If the power source can be operated at 56 amperes and the new 8-mm—7-mm trim used, the same screen illumination can be obtained with a saving of about 30 per cent in carbon consumption, but at an increased power consumption of approximately 12 per cent. These new carbons will be marked with white ink to distinguish them from the standard product which has been labelled with blue ink. The maximum permissible current will be printed on each carbon beside the trade-mark. The unit carton will have a special