NATURE [DECEMBER 16, 1915 chlorohydrin of glycerol.-E. A. Martel : The contamination of subterranean waters as a consequence of the war. An example is given of contamination of a water supply persisting for a whole year, and the necessity of special precautions in maintaining the purity of potable water is pointed out. It must not be taken for granted that after a certain lapse of time processes of self-purification are sufficient.-}. Bergonie : A new method of surgical radioscopy in red

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... A. Qenault, L. Fournier, and L. Guenot : Five hundred and fifty cases of syphilis treated by an organic compound of arsenic, silver bromide, and antimony!. Further experiments on treatment of syphilis with the compound proposed by M. Danysz under the name of "102." It has the special advantage that there is a wide range between the parasitic dose and the toxic dose. The therapeutic effects are comparable with those of arseno-benzene. The preparation possesses great stability, the treatment is simple and without danger, and extremely efficacious. BOOKS RECEIVED.