Abstract
PARIS. Academy of Sciences, August 18.—M. Bouquet de la Grye in the chair.—The resistance to traction of mortar, by M. Considere. The experiments were carried out on prisms strengthened at the angles with iron wires. The results of the traction experiments were automatically recorded by the testing machine, and reduced facsimiles of these curves accompany the paper.—On the year's work at the observatory at the summit of Mont Blanc, by M. J. Janssen. The researches which are pro posed for the present year include a study of the modifications which the hemoglobin of the blood undergoes with muscular effort at varying altitudes, the relations between the altitude and rarity of the atmosphere, and the richness of the spectrum in violet and ultra-violet rays, studies on atmospheric electricity, and the effect upon the composition of the blood and the respiratory exchanges of altitude alone or combined with muscular effort.—On the assemblage of two bodies, by M. G. Koenigs.—On some organic addition compounds, by M. P. Lemoult. A description of the preparation and properties of some addition compounds of chlorodinitrobenzene with some diamines.—Experimental researches on the conservation of muscular potential in an atmosphere of carbon dioxide, by M. Lhotak de Lhota. Carbonic anhydride accelerates the fatigue of a muscle by stopping the disengagement of energy. On account of this the muscle cannot be used up; the energy may be given off after the removal of the carbon dioxide, and hence this gas constitutes a favourable factor in preserving muscular energy.—The comparative study of the organic fluids of the sacculina and the crab, by MM. Louis Bruntz and Jean Gautrelet.—On some fossil pollens, male prothallia, pollenic tubes, &c, in the Coal-measures, by M. B. Renault. Many pollen grains of the coal epoch contain a perfectly well-marked male prothallus, the compartments of which contain the mother cells of the antherozoids. This prothallus may emit a pollen tube, as in Stephanospermum, or allow the antherozoids to escape directly from the pollen chamber, as in Aetheotesta.—The influence of cream separation on the principal constituents of milk, by MM. F. Bordas and Sig. de Raczkowski. The removal of the fat to the extent of 98 per cent, takes away at the same time 69 per cent, of the lecithin. In the authors' opinion, this is sufficient to explain the high death-rates through gastro-intestinal troubles in those towns where the sale of skimmed milk is allowed. It also accounts for some diseases in infants fed exclusively on sterilised milk.—On the physical geography of the Western Yaila, Crimea, by M. E. Daniloff.
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Societies and Academies . Nature 66, 432 (1902). https://doi.org/10.1038/066432b0
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DOI: https://doi.org/10.1038/066432b0