β Scribed by C.
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Influence of a Polished Specular.
Water-Spouts at Etretat.--Leon Lalanne, in a letter to M. Faye, records his recollections of an interesting phenomenon which he observed on a September morning, in 1851. Eleven water-spouts were formed in less than a quarter of an hour, before the eyes of spectators who were surprised and considerably disturbed at the consequences of the phenomenon, which was driven directly before them. Finally, without lightning, without~thunder-claps, but in the midst of a gust of wind which culminated in a tempest, one or two of these water-spouts were seen to break ill a deluging rain against the rocks which jutted from the western part of the beach. The spectators were soon overwhelmed with torrents of rain, accompanied by heavy squalls of wind, but without any other evil result than that of being thoroughly drenched. The occasion was remarkable ibr the large number of simultaneous water-spouts, and M. Fayc regards it as strongly confirmatory of his whirlwind theory. dus, xcv, 430. C.
π SIMILAR VOLUMES
## Incombustible and Impermeable Wood,--M. Folbaeci uses the fbllowlng preparation: Sulphate of zinc, 55 lbs.; potash, 22 lbs. ; alum, 44 lbs. ; oxide of" manganese, 22 lbs. ; sulphurie acid of 60 Β°, 22 lbs.; water, 55 lbs. All tile solid ingredients are put into a boiler containing the water at 4