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Show 5CIENCE SKETCHES"" CEILING-MOUNTED nursing service columns ore making it easier for nurses to care for post-operative patients in recovery rooms. The stainless steel columns, supplied by National Cylinder Gas, Chicago, eliminate equipment that previously had to be connected to wall out- '. lets by hoses and cables. THE'TINCH" test, utilbed by many shoppers to test ripeness of fresh fruit and vegetables, may be ; eliminated by a new meter that reveals hidden internal defects by measuring the amount of light penetrating food items, according accord-ing to the Department of Agriculture. Agri-culture. mj,,.,. , in, nr- - - HALF of what a Ph.D. in Aero- space Engineering knows when he graduates will be obsolete ttj years, and half of what he will I need to know for the next dec- ade is unknown today, reports a I Georgia Tech administrator. A NEW FIBER, EF-121, may eliminate the tendency for nylon-cored tires to tlat-spot after standing. A combination of nylon and polyester in the tires is said to retain the strength of nylon while smoothing out the, ft 1 1 -ft ah V t ICE IS "HOT" when compared to l! temperatures in the ultra-cold H tie d of cryogenics, says National f j Cylinder Gas, Chicago. Liquid 5 nitrogen, the company reports, has i a temperature of -320 degree F. METEORITES that plu"9 j J earth today are mostly .a retf-a retf-a collision in space W years ago, says University ot " cago scientist Dieter Hey"- i The unique structure ond m" composition of the meteoritesss , gests that they originated one major crash. i Wi |