Abstract
Bulletin de l'Académie Royale de Belgique, February.—Researches on the colloidal state, by C. Winssinger. This is the first part of a memoir describing a series of experiments undertaken to determine the various conditions of the colloidal state—that is, of the state assumed under certain circumstances by bodies generally insoluble in water. For the present the author confines himself to describing the mode of preparation and the chief properties of the colloidal substances. All the fifteen sulphides studied by him (those of mercury, zinc, tungsten, molybdene, indium, platinum, gold, palladium, silver, thallium, lead, bismuth, iron, nickel, and cobalt) have been obtained in the colloidal state, They bring up to thirty-one the number of colloids now known to science. Some have been prepared by Graham's method, others directly by treating the oxides suspended in the water with hydrosulphuric acid.—On the pretended pro-atlas of mammals and Hatteria punctata, by Jules Cornet. The bony process between the occipital and the atlas known as the pro-atlas or proto-vertebra, and found in crocodiles and some other reptiles, is here shown not to exist in the mammals as supposed by some naturalists. The view of Smets regarding its absence from Hatteria is also confirmed.—On the process employed by the fresh-water Gasteropods for crawling over the liquid surface, by Victor Willem. This process is shown to be somewhat analogous to that of snails moving on dry land, being effected by secreting a mucus which enables the mollusk to adhere to the surface.—Researches on the volatility of the carbon compounds; chloro-oxygenated compounds, by Louis Henry. The object of these researches is to examine, in reference to their volatility, the compounds in which chlorine and oxygen are simultaneously combined with carbon. The subject is discussed under three heads: (1) the compounds comprising the system >C – O; (2) the system →C – OX; (3) the mixed derivatives simultaneously including both these systems.
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Scientific Serials . Nature 38, 20–21 (1888). https://doi.org/10.1038/038020b0
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DOI: https://doi.org/10.1038/038020b0