Abstract
PARIS. Academy of Sciences, September 9.—M. Mascart in the chair.—On a gaseous interrupter: K. R. Johnson. The interrupter consists of two plates of aluminium placed in a solution of an electrolyte. The heating effect of the current evolves a bubble of steam, which temporarily breaks the circuit; this is rapidly condensed in the upper part of the cell, and so causes a series of makes and breaks. It has the advantage of working independently of the dimensions of the metallic circuit, and even in the absence of an induction coil or a solenoid. Its disadvantage is that the frequency is rather low.—On a reagent for the hydrides of phosphorus, arsenic, and antimony: P. Lemoult. These gases, when diluted with an inert gas, react with a solution of the double iodide of mercury and potassium, giving characteristic crystalline precipitates, orange, yellow or brown in colour. They have been analysed, and correspond to the formula RHg3I3, in which R may be P, As, or Sb.—Benzopinacone and benzopinacoline: Amand Valeur. Evidence is given that the compound obtained by W. Dilthey and E. Last by the interaction of ethyl oxalate and phenylmagnesium bromide is a pinacone and not a pinacoline as supposed by them.—The synthesis of estragol and aromatic derivatives with an unsaturated chain: M. Tiffeneau.—On the reproductive apparatus of the Mucorina?: J. Dauphin. Glucose, levulose, and galactose favour the appearance of sporangia; lactose and saccharose give only sporangia and chlamydospores; maltose and mannite give uniquely chlamydospores.—On macles: G. Friedel.—The relations between the blood circulation and the measurement of tactile sensibility: N. Vaschide. It is shown that there is an extremely close relation between the circulation of the blood and the tactile sensibility.
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Societies and Academies . Nature 70, 500 (1904). https://doi.org/10.1038/070500b0
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DOI: https://doi.org/10.1038/070500b0