346 EXPERIMENT STATION EECORD. [Vol. 37 



In continuation of previous studies (E. S. R., 36, p. 643), this bulletin de- 

 scribes most of the varieties of gladiolus received for trial on the grounds of 

 the Cornell University department of floriculture in cooperation with the 

 American Gladiolus Society. The descriptions are preceded by an account of 

 the methods used in testing and describing the varieties. 



The culture of garden roses, A. C. Bf.at. (Cornell Reading Course for the 

 Farm, No. 121 {1911), pp. 189-215, figs. 11). — A popular treatise on rose culture. 



Sweet peas up-to-date, G. W. Kebe {Philadelphia: W. Atlee Burpee <i Co., 

 1917, rev. ed., pp. 100, figs. 16). — In addition to cultural directions a descriptive 

 list is given of all varieties of sweet peas, as far as known, introduced up to 

 1917. 



Milady's house plants, F. E. Palmei{ {New York: A. T. De La Marc Co., 

 Inc., 1911, pp. 176, figs. 96). — A popular treatise on the selection, cxilture, and 

 care of various house plants. 



Putnam's garden handbook, Mae S. Ceoy {Neio York: G. P. Putnarti's Sons, 

 1917, pp. 'V-\-S59). — A popular manual of ornamental gardening. 



The joyous art of gardening, Frances Duncan {New York: Charles Scrib- 

 ner's Sons, 1917, pp. XIII +239, pis. S, figs. 54). — A popular treatise on the 

 planning and planting of home grounds, designed especially for the amateur 

 gardener. 



" Know your city " trees, C. Bannwabt {Newark, N. J.: Newark Shade Tree 

 Com., 1916, pp. 20, figs. 14). — This comprises a directory of the noteworthy trees 

 of Newark, N. J., with special reference to those of historic and special botanic 

 interest. 



FORESTRY. 



Trees worth knowing, Julia E. Rogers {Garden City, N. Y.: Douhlcday, 

 Page <£ Co., 19l7, pp. XXIII+29], pis. 48). — This comprises popular descriptive 

 accounts of the principal trees of the United States. The trees are grouped as 

 nut trees, water-loving trees, trees with showy flowers and fruits, wild rela- 

 tives of our orchard trees, the pod-bearing trees, desiduous trees with winged 

 seeds, the cone-bearing evergreens, and the palms. 



A bud and twig key to the more important broadleaf deciduous trees in 

 the United States, O. L. Sponsler {Ann. Arbor, Mich.: George Wahr, 1916, rev. 

 ed., pp. 26, figs. 8). — About S5 species of the more important broadleaf deciduous 

 trees, including the more important forest trees, as well as a few of the smaller 

 trees and more common exotics, are given in the key. 



The pine trees of the Rocky Mountain region, G. B. Sudworth ( U. S. Dcpt. 

 Agr. Bui. 460 {1917), pp. 40, pls. 42). — Supplementing a previous bulletin deal- 

 ing with cypress and juniper trees (E. S. R., 33, p. 343). this bulletin conipri-ses 

 descriptions and illustrations of the distinguishing characteristics of all of the 

 pine trees that inhabit the Rocky Mountain region. Graphic illustrations of 

 the range of these trees and discussions of their forest habits are also included. 



Note on the forests of Java and Madoera of the Dutch East Indies, R. C. 

 Milward {Calcutta: Govt., 1915, pp. 8, pis. 5). — The note deals chiefly with the 

 extent, silvical management, exploitation, yields, and revenues of teak forests in 

 Java and Madoera. 



Factors causing variation in the yield of camphor in the Florida camphor 

 tree, S. C. Hood {Jour. Indus, and Engin. Chem., 9 {1917), No. 6, pp. 552-555). — 

 The present paper is based on observations on camphor trees growing under 

 various conditions in Florida during the years 1907 to 1912, at which time the 

 author was on the scientific staff of the Bureau of Plant Industry of the U. S. 

 Department of Agriculture. The paper presents the more important results 

 having a direct bearing on the methods of commercial production of camphor. 



