(1) An Introduction to Physical Science (2) An Elementary Course in Practical Science

Abstract

(1) THE book by Dr. Getman is intended for those students who, owing to little knowledge of physics, find it difficult to understand lectures on general chemistry. It deals in a brief manner with all the usual sections of physics, with the exception of sound. It is in many respects an admirable book. The chief laws and principles are in most cases very clearly expressed. As an example of this, attention may be directed to the concise and unambiguous treatment of the distinction between “mass” and “weight.” The diagrams are good, and logical order is preserved. There is no doubt that a student thoroughly conversant with the contents would have little difficulty with his chemistry from a physical point of view. On the other hand, we think that for several reasons the book itself presents difficulties. The definitions, particularly in the first chapter or two, are sometimes rather loose. Matter is apologetically defined as “that which occupies space,” a statement which is worthless. Surely a better provisional definition is “matter is that which has weight,” and then the extension of “weight” to “gravitational attraction” could follow at a later stage. Again, a solid is defined as “a body which at ordinary temperatures does not change its shape under slight changes of pressure.” This is untrue. There is no distinction, except in degree, between solids and fluids in this respect. The terms “stress” and “strain” are insufficiently defined, being merely given as alternatives for force and distortion respectively.

(1) An Introduction to Physical Science.

By Dr. F. H. Getman. Pp. ix+257. (New York: J. Wiley and Sons; London: Chapman and Hall, Ltd., 1909.) Price 6s. 6d. net.

(2) An Elementary Course in Practical Science.

Part iii. By C. Foxcroft S. J. Bunting. Pp. 64. (London: G. Philip and Son, Ltd., n.d.) Price 6d. net.