Identification of the Commercial Timbers of the United States

Abstract

A clear, logical, and thoroughly up-to-date colloids as well as inorganic dispersions. Everytreatment which attempts, as far as possible, * day techniques are carefully reviewed; chapters to account for colloid interactions on a simple on soaps and carbohydrate colloids are included; crystalloid basis. The text embraces the bio-and proteins and emulsions are fully covered. Presents information which will enable the stu-minute characters. The text contains separate dent to identify the commercial timbers of the illustrated keys based on gross and minute fea-United Sitates by (1) characters visible to the tures, as well as descriptions of the woods by naked eye and with the hand lens, and by (2) species. Series in Physics. Ready in August A picture of the physical world as seen by the the ideas which, evolving from the older kinetic modern physicist. The book explains, with em-theory, have culminated in the new atomic phasis on concrete illustration, the meaning of theory of today. Mining Engineer. 307 pages, 41 x 7, flexible, illustrated. $2.50 All phases of prospecting are covered in this simple, practical new book. Concise explanations are given of mining facts, field methods, and the procedures required in locating, staking, and operating a mine. Elements of mineralogy and petrology, surveying, camping, mining law, etc., are also dealt with. The treatment is particularly suitable for elementary courses.