3. 3-Bromovinylacrylic acid absorbs one molecule of bromine in the 3,4-position to give 3,3',4-tribromo-Arpenteme acid. Its structure was proved by ozonization. 4. An improved method for the preparation of vinylacrylic acid is given which doubles the best yield heretofore obtained.5. On distillation 3,4-dibromo-Arpenteme acid loses two molecules of hydrogen bromide to give a -lactone whose structure was proved to be CH2=CCH=CHCO Chicago, Illinois

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Only a few instances of the absorption of ethylene by cuprous chloride have been recorded in the literature. These absorptions were observed at atmospheric pressure and, usually, with aqueous solutions.

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Dehydrogenation of «-Heptane with Chromia-Alumina 2059 is reported by Biltz and Balz4 who measured the dissociation pressure of various ammonia salts and found that these pressures alternated as the series was ascended. An alternation in the yield of Grignard reagents with alkyl iodide chain length has been reported by Gilman and In general, metal cutting is accompanied by a high surface temperature, high pressure between the moving surfaces and the production of a considerable area of clean, highly reactive surface. Fluid film formation, common to ordinary types of lubrication, plays no part in metal cutting. The mechanism of cutting fluid action is obviously a problem in the extreme boundary region of lubrication. While much evidence has accumulated to uphold the role of adsorbed surface films in reducing the frictional resistance of sliding surfaces under relatively mild boundary lubrication conditions,6•7•8 another mechanism is believed to obtain in the extreme boundary (4) W.