Curtis, Carleton C., _Nature and Development of Plants_. N. Y.: Henry Holt & Co., 1907, 471 pp. Chapter III is a very clear and excellent discussion of the structure of the stem of plants (including wood). Encyclopedia Brittannica, Eleventh Edition, Cambridge: At the University Press. Article: _Forests and Forestry_, Vol. 10, p. 645. Article: _Plants_, Anatomy of, Vol. 21, p. 741. Article: _Timber_ Vol. 26, p. 978. Felt, E. P., _The Gypsy and Brown Tail Moths_. N. Y. State Museum: Bulletin 103, Entomology, 25. Valuable for colored illustrations as well as for detailed descriptions. Fernow, B. E., _Economics of Forestry_. N. Y.: T. Y. Crowell & Co. 1902, quarto 520 pp. A treatment of forests and forestry from the standpoint of economics, including a comprehensive exposition of the forester's art, with chapters on forest conditions, silviculture, forest policies, and methods of business conduct, with a bibliography. Fernow, B. E., _Report upon the Forestry Investigation of the U. S. Department of Agriculture_, 1887-1898. Fifty-fifth Congress, House of Representatives, Document No. 181. Quarto, 401 pp. A review of forests and forestry in the U. S., of forest policies of European nations, particularly of Germany, of the principles of silviculture, of a discussion of forest influences, and a section on timber physics. Harwood, W. S., _The New Earth_. N. Y.: The Macmillan Co., 1906. 378 pp. A recital of the triumphs of modern agriculture. Chap. X on modern forestry, describes what has been done in different states in conservative lumbering. Hough, Romeyn B., _American Woods_. Lowville, N. Y.: The author. An invaluable collection in eleven volumes (boxes) of sections of 275 species of American woods. There are three sections of each species, cross, radial, and tangential, mounted in cardboard panels. Accompanied by a list of descriptions and analytical keys. Hough, Romeyn B., _Handbook of the Trees of the Northern States and Canada_. Lowville, N. Y.: The author. 470 pp. A unique, elegant, and sumptuously illustrated book, with photographs of tree, trunk, leaf, fruit, bud, and sometimes wood, a map of the habitat of each species, and a full and careful description of tree and wood. Intended for botanists, foresters and lumbermen. Johnson, J. B., _The Materials of Construction_. N. Y.: John Wiley & Sons. 1898. 775 pp. Chapter XIII is identical with Forestry Bulletin X, Roth's _Timber_. Keeler, Harriet, _Our Native Trees_. N. Y.: Scribner's. 1900. 533 pp. A very attractive and popular book showing great familiarity with the common trees and love of them. Numerous photographs and drawings. Lounsberry, Alice, _A Guide to the Trees_. N. Y.: Frederick A. Stokes Co. 313 pp. A popular description of some 200 common trees, with plentiful illustrations.