Abstract
Bulletin de la Société des Naturalistes de Moscou, année 1883, No. 2.—Researches into the compounds of the acetylenes, by A P. Sabaneeff. The author has studied these imperfectly known compounds, namely, di-brom-acetylene, and the double compounds of acetylene with bromine and chlorine, and with chlorine and iodine. He has discovered a new method of preparing larger quantities of the former by acting with zinc on an alcoholic solution of the four-brom-acetylene, and describes its various reactions.—On the periodical changes of level of the ocean, by H. Trautschold (in German). The author, who already in 1869 supported the idea that the geological changes are due, not to the rise of the continents, but to the falling of the level of the ocean, finds in the disposition of the series of deposits of all ages up from the Silurian, on the plains of Russia, new and very interesting arguments for his idea. He maintains that the level of the ocean was falling from the Silurian epoch to the end of the Trias, when the seas had, around the now Russian plains, nearly the same shape as now. The level of the ocean rose, however, during the Jurassic period, retiring again about the end of the Chalk period.-On the bastard of the Anas crecca with Anas boschas, by Dr. N. SewertsofF, with a coloured plate (in German). The most interesting bastard of the nearly two extremes of the ducks (relatively to their size) has been shot in the province of Ryazan. The Russian ornithologist describes its features at length, and adds some remarks on the bastards of the ducks generally.—Mono-petal plants of Radde, by Ferd. von Herden (continued).-Description (in German) of the Veronicas, Castillejas, Siphonostegia, Phtheirospermum, and Omphalotrix.—A Mastodon tooth, note by H. Trantschold.—On the photographic photometry of fixed stars, by Ed. Lindemann (in German),—Materials for the fauna of Hemiptera of Russia, by W. Yakovleff, being a description, in Russian, of several new species.
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Scientific Serials . Nature 29, 300 (1884). https://doi.org/10.1038/029300a0
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DOI: https://doi.org/10.1038/029300a0