(1) The Theory of Valency (2) Qualitative and Volumetric Analysis (3) Laboratory Manual arranged to accompany œA Course in General Chemistry (4) The Rugby Course of Elementary Chemistry

Abstract

(1) THE perusal of a treatise on valency leaves an impression of incompleteness and uncertainty, of a mass of theories no single one of which can claim to correlate and interpret more than a portion of the relevant facts. This aspect of the matter, to which reference was “made in the review of the first edition of. Dr. Friend's excellent volume (NATURE, 1909, Ixxx., p. 395), has been accentuated by recent work on radioactivity, and the modified views with regard to chemical combination and valency to which this work has led. . The author, although fully, aware of the extent to o which earlier conceptions are undergoing change, points out that nothing like finality has been reached.He therefore does not attempt in the present volume any full discussion of the latest views, and merely indicates the main lines along which progress is being made. This is a wise decision.

(1) The Theory of Valency.

By Dr. J. Newton Friend. Second edition. Pp. xiv + 192. (London: Longmans, Green and Co., 1915.) Price 5s. net.

(2) Qualitative and Volumetric Analysis.

By W. M. Hooton. Pp. 86. (London: Edward Arnold, 1915.) Price 3s. net.

(3) Laboratory Manual arranged to accompany œA Course in General Chemistry.

By Prof. W. McPherson W. E. Henderson. Pp. v + 141. (Boston and London: Ginn and Co., 1915.) Price 3s.

(4) The Rugby Course of Elementary Chemistry.

By H. P. Highton. P.p. 79. (London: Edward Arnold, 1915.) Price 2s. 6d.