11 NOVEMBER 1911, Page 27

The Law of the Air. By Harold D. Hazeltine, LL.D.

Three Lectures delivered in the University of London. (Hodder and Stoughton. 5s. net.)—We cannot discuss in detail the contents of this volume, as they are of a technical kind, though we may say that we never saw a technical subject treated in so interesting and illuminating a way. Perhaps the chief difficulty of the matter lies in the application of the maxim that the rights of a freeholder reach usgue ad caelum. Has he a cause of action against an airman who passes over his land at an altitude of a thousand yards ? The rights of a State are in a way analogous. Dr. Hazeltine is a pioneer in dealing with the "Law of the Air," and will certainly be helpful to any who may follow him.