necticut, Storrs, Connecticut. Fiberglas, one of the more recent products of industrial research, is entering into our daily lives to a steadily increasing degree, but the role it plays is seldom realized because ninety-nine per cent. of all Fiberglas products go into concealed locations, Mr. Slayter said. The most recent automobile, he pointed out, may contain up to eighty-four individual pieces of manufactured glass in one form or another, but the average driver is not ordinarily conscious of their presence because they are woven into yarns, tapes, braids, and cloth which are used principally for electrical insulation and to provide industry with fabrics that resist heat and corrosive vapors. The present Fiberglas-insulated automobile generator, while no larger than the generator of previous years, supplies fifty per cent. more electrical energy for charging the battery and supplying current for radio and lights. In the form of glass wool, Fiberglas is widely used for thermal insulation in buildings, and household equipment, and to conserve fuel, control heat in industry. The purchaser of a kitchen range, Mr. Slayter said, has a ninety per cent. chance of buying a range with Fiberglas insulation; if he buys a refrigerator, there is a sixty per cent. chance that his refrigerator will be insulated with Fiberglas. Railroad cars, buses, airplanes and ships are also insulated against heat and cold with this wool-like form of glass. Fiberglas yarns as now made have a tensile strength of well over 25o,ooo pounds per square inch, and in the laboratory Fiberglas yarns with a tensile strength as high as 3,ooo,ooo pounds per square inch have been produced. Mr. Slayter said, "The strongest plastic fibers brought to our attention break at 4o,ooo pounds per square inch while the best aluminum alloys, we are told break at 65,ooo per square inch. To the best of our knowledge, Fiberglas is the strongest of all the tested materials made by either nature or man." R. H. O. 2o3