Abstract
PARIS. Academy of Sciences, July 30.—M. Lœwy in the chair.—Conditions necessary for the production and the perception of murmurings in tubes through which air currents pass, by M. A. Chauveau.—On certain of the later geological and climatic phases in Barbary, by M. A. Pomel. The quaternary period was marked in Barbary by (1) a rainy phase with formation of alluvial deposits, followed by (2) a dry period characterised by the formation of travertinous crusts, and (3) the partial submergence and reappearance of the coast districts with the production of a narrow band of marine beds and a moderately humid climate, which has since deteriorated to the present condition of excessive dryness.
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