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Show 5ed TRADIC (for Transistor-Digi-, tal-Computor) , was developed for the United States Airforce and can operate flawlessly in planes flying at supersonic speed. It uses transistors, tran-sistors, another laboratories development, devel-opment, instead of vacuum tubes and is believed to be the first all-transistor all-transistor computer designed for aircraft. It is capable of doing 60,000 additions or substractions, or 3,000 multiplications or divisions a second. It can run through an entire problem requiring about 250 different steps of computation in less time than it takes to say "Tradic". j Device Announced ( I To Convert Sun I To Electricity j The efficiency of the Bell Solar ! battery man's first successful' de-vice de-vice for converting sunlight direct-! direct-! ly into substantial amounts of electricity elec-tricity has been practically doubled doub-led in the one year since its announcement, an-nouncement, according to J. W. Sncll, district manager of Mountain Moun-tain States Telephone. Bell Telephone laboratory scientists scien-tists have increased the battery's efficiency to 11 per cent comparable compar-able to the efficiency of the best gasoline engines. When first shown, the battery had a 6 per cent efficiency. ef-ficiency. Mr. Snell said the announcement of this new stiide toward utilizing 1 the sun's energy came shortly after Bell scientists had also succeeded in developing a miniature electronic electron-ic "brain", capable of computing complex mathematical problems in 15 thousandths of a second. The new electronic "brain", call |