CHEMISTRY AND ITS BORDERLAND.
Chemistry and its Borderland. By Alfred W. Stewart. (Longman and Co. Ss. net.)—Dr. Stewart gives the non- technical reader a lucid account of "some recent develop- ments in chemistry," in which he avoids the use of chemical notation. He first treats of the influence of chemistry on industry. He then writes a chapter on the relation of chemistry to medicine, dealing chiefly with the researches of Ehrlich, the discoverer of salvarsan. He goes on to describe the singular properties of radium and its derivative niton, which lead him to a discussion of transmutation and the nature of the elements. We note that be accepts the researches of Collie and Patterson as showing that hydrogen has actually been transmuted into the two elements of helium and neon, and is thus led to the conclusion that atoms are not the ultimate basis of matter.
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