1 SEPTEMBER 1888, Page 23

Applications of Dynamics to Physics and Chemistry. By J. J.

Thomson, Cavendish Professor of Experimental Physics, Cam-

bridge. (Macmillan and Co.)—The object of this treatise is to

explain the relation of phenomena, and to develop dynamical prin- ciples for application to phenomena necessarily co-existent, and

therefore correlated. Hence the physics of chemistry, so fast being reduced to a basis of mathematics, and electricity, magnetism, and thereto-electricity are tested by dynamical prin- ciples in default of " trustworthy theories." Professor Thomson's treatise is chiefly the substance of lectures, and is a valuable addition to dynamical literature.