Irrigation Institutions. By Elwood Mead. (Macmillan and Co. 5s. net.)—Mr.
Mead defines the purposes of his book by the terms of the sub-title. It is " a discussion of the economic and legal ques- tions created by the growth of irrigated agriculture in the West," by " West" being understood the arid or semi-arid Western States in the Union. The chief States included in this term are Colorado, California, Utah, and Wyoming. Other regions where the work is carried on are Arizona, New Mexico, Kansas, Nebraska, Montana, Idaho, Nevada, and Washington. It may be said that Ole country west of 100 deg. W. longitude is, more or less, under the operation of the system, Oregon being an exception. The subjects discussed are the methods of irrigation (of course, in outline), and the highly complicated legal questions which arise out of water rights. Much of the discussion applies to the States named only, but those interested in irrigation may learn much from the book.