THE SCIENCE OF LUBRICATION.

EVERY keen motorist is interested in the vital problem of lubrication, and in Lubricating Oil Tests, by J. E. Southcombe, M.Sc., published by the Henry Wells Oil Co., Ltd., there is a wealth of information lucidly expressed. This book deals with the various essential properties such as viscosity, ” oiliness,” and the decomposition of oil in use, and gives details of the methods by which these are measured in the laboratory.