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Show SCIENCE SKETCHES j PHOSGENE plays an important 1 ; role in a number of industries. The j colorless gas that smells like new- ; ; mown hay is used in the manufac- ! j ture of polyurethane foams used , in applications ranging from insu- 'l lation to chair cushions, reports 't Chemetron Chemicals, Chicago. BECAUSE TUNA are heavier than salt water, they must keep swimming swim-ming or else they will sink to the ocean floor, says a University of Wisconsin researcher. iiwiim.uiiwmCT'y'i":.' POLE VAULTERS who use fiberglass poles can theoretically aii a foot and a half or more to their best jumps, say researchers at Pennsylvania State University. |