Abstract
PARIS. Academy of Sciences, October 5.—M. Albert Gaudry in the chair.—The influence of water on the structure of the aerial.roots of orchids, by M. Gaston Bonnier. Contact with water produces an effect on the aerial roots of many orchids, either by preventing the sclerification or lignification of the tissues' of the central' cylinder, a result which seems natural when compared with the modifications of the roots of aquatic plants, or by provoking a reaction tissue in the pericycle, capable of protecting the rest of the cylinder against the action of water.—On a class of: linear differential equations, by M, Alexander Cheasin.—The conditions which determine the sign and the magnitude of electrification by contact, by M. Jean Perrin. The contact charge between a solid and a liquid can be readily studied by means of electrical osmosis, the charge being always greater when the body, is a good ioniser, such as water.—The heats of combustion of organic compounds considered as additive properties; alcohols and phenols, ether-oxides, aldehydes and ketones, by M. P. Lemoult By assigning definite values to certain atomic groupings it is possible to calculate the heats of combustion of organic compounds of the above-mentioned classes with considerable accuracy.—The action of phosphorous acid upon mannite; remarks on mannide, by M. P. Carré. The ether
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Societies and Academies . Nature 68, 592 (1903). https://doi.org/10.1038/068592a0
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DOI: https://doi.org/10.1038/068592a0