POEESTRY, 343 



The text is given of tlie Vermont net of 1912 relating to tlie taxation of 

 young timber, as well as the act of 1912 providing for school-endowment forests. 

 Data on the height and diameter growth of white pine, Norway pine, balsam 

 fir, and white ash are appended. 



The cypress and juniper trees of the Rocky Mountain region, G. B. SuD- 

 WORTH ill. S. Dept. Agi: Bill. 207 {1915), pp. 3Q, pU. 37).— This bulletin de- 

 sci-ibes the distinguishing characters, geographic distribution, and forest habits 

 of all the known species of cypress (Cupressus) and junipers ( Juniperus) grow- 

 ing within the Rocky Mountain region of the United States, including also 

 Canadian territory lying directly north of the Rockies and Mexican territory 

 adjacent to the Southwest. The descriptive text is accompanied by illustra- 

 tions representing foliage, fruits, seeds, and other important parts of the trees 

 in their natural size as well as maps showing the geographical distribution of 

 the different species. 



Caoutchouc, A. J. TJltee {Caoutchouc. Haarlem: II. D. TjeenJc WilUnk & 

 Hon, 1013, pp. yiII-\-93, figs. 38). — A treatise on the culture, diseases and 

 pests, tapphig, and preparation of rubber with special reference to Ilevca brasil- 

 iensis and Ficus elastica. Notes are given relative to vulcanization, regenera- 

 tion, and rubber surrogates, together with statistics of rubber production and 

 consumption in different countries. 



Cinchona culture, A. Groothoff {Dg Kmaacltuur. Haarlem: H. D. TjeenJc 

 Willinl- tC- Son, 1912, pp. Ill, figs. 30). — A treatise on cinchona with reference to 

 the history of the industry, the introduction of the cinchona tree into Asia, its- 

 botany and culture, the exploitation and preparation of the bark, uses and com- 

 merce, and geographical distribution of the industry. 



Union of an oak and a birch, W. T. Davis {Proc. Staten Isl. Assoc. Arts 

 and Sci., 5 {1913-14), No. 1-2, p. 10, pi. 1). — ^An illustration with descriptive 

 notes is given of a white oak (Quercus alba) and black birch {Betula lenta) 

 that have grown together in such a manner that if the trunk were all that could 

 be seen they would ordinarily be taken for one individual. 



Union of an oak and a beech, A. Hollick {Proc. Staten Isl. Assoc. Arts and 

 Sci., 5 {1913-14), No. 1-2, pp. 11, 12. pi. 1).—Kn illustration with short de- 

 scriptive notes is given of a white oak {Quercus alha) and a beech {Fagus 

 americana) which have grown together at the trunk similar to the above-noted 

 trees. 



Notes on the germination of some tree and shrub seeds, W. Kinzel 

 {Natiirw. Ztschr. Forst u. Landw., 13 {1915), No. 4-5, pp. i29-i59).— During the 

 course of the author's investigations during the past 10 years relative to the 

 effect of frost, light, and other influences on the germination of seed of various 

 kinds (E. S. R., 26, p. 821; 29, p, 421), germination tests were made of tho seed 

 of a number of trees and shrubs of diverse .species. The present article comprises 

 obsen-ations on the germination history of these trees and shrubs, with special 

 reference to the development, ripening, and resistance faculty of the seed of in- 

 digenous and cultivated forms of linden. 



The application of town sewage and house garbage as a forest manure, 

 ScfiWAPPACH {Ztsclir. For St u. Jagdw., 41 {1915), No. 4, pp. 249-256).— Experi- 

 ments conducted in the neighborhood of Berlin in the use of sewage waters 

 diluted by rain water and of house garbage indicate that an important increase 

 in size may be obtained in various hardwoods by irrigations with sewage water, 

 but that such irrigation should be confined to the first few years in the life of 

 pine and spruce trees and is apt to cause damage to all evergreen trees after a 

 few years' time. The trouble appears to be due rather to a change in the level 

 of the ground water than to any specific injury from the sewage water. The 



