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Investigation of fireresisting properties
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absorption accuracy addition aircraft airplane alloys American Gas Association American Petroleum Institute American Society apparatus Army Signal Service Association Automotive Engineers building Bureau of Standards calibrations carbon cement cent chemical clay color commercial standards Committee for Aeronautics completed concrete constructed cooperation corrosion density determined developed duralumin effect Elastic hysteresis electrical experimental Federal specifications fee value feldspar fiber fire tests frequency gages Government heat improved inch increase index of refraction industries instruments insulating International investigation iron kilocycles laboratory leather levulose lime liquid lubricating machine manufacture mechanical ments metallurgical metals meter methods Miscellaneous National Advisory Committee National Physical Laboratory obtained optical glass paper piezooscillators pipe plates platinum pounds preparation pressure properties radio refraction resistance rhodium rubber samples screw threads silica specimens Steamboat Inspection Service steel sugar temperature textiles thermal expansion tion transmission tubes various varnishes Washington Weights and Measures welded xylose