546 EXPERIMENT STATION EECOED. [Vol.37 



were picked when ripe and succulent, the seed being at once removed from 

 the pulp and dried. In the second, the berries were picked in a similar manner 

 but allowed to dry spontaneously, which resulted in much molding and partial 

 decomposition. In the third, the berries were allowed to remain on the plants 

 until they were dry. 



The first method produced the heaviest and the third method the lightest 

 seed. The latter method is likely to result in the admixture of some immature 

 seed. The first method produced seed of the best uniform color, while the second 

 method resulted in seed of very poor color. The germination percentage was 

 highest in the first and lowest in the third method. Seed from different indi- 

 vidual plants was found to vary considerably in vitality. 



Preliminary report on cooperative experiment [with Datura], C. M. Wood- 

 worth and H. A. Lakgenhan {Bui. Univ. Wis., No. 829 {1916), pp. 51, 52).— 

 A brief statement of progress made in breeding experiments with Datura 

 species, with special reference to a determination of the inheritance of alkaloidal 

 content. Analyses made in 1915 showed that the alkaloidal content of leaves 

 varied much, both in the same plant and in different plants of the same species. 

 The alkaloidal content of leaves Ln 1916 appeared to be more uniform. 



Possibility of the commercial production of lemon-grass oil in the United 

 States, S. C. Hood {Amer. Jour. Phann., S9 {1917), No. i, pp. 180-191).— This 

 article is reprinted from the bulletin previously noted (E. S. R., 36, p. 538), 



The sweet pea (Lathyrus odoratus) in the flower garden, A. C. Ghosu 

 {Agr. Jour. Bihar and Orissa [India], 4 {1916), Double No., pp. 55-65. pis. 2).- 

 In addition to cultural directions the varieties of sweet peas tested under the 

 direction of the Botanic Garden at Sabour, India, are here described. 



The culture and diseases of the sweet pea. J. J. Tauuenhaus {Ncic York: 

 E. P. Button d Co., 1917, pp. XXiy+2S2, pis. 22, figs. 16).— A practical treatise 

 on the subject, the successive chapters of which discuss the history, evolution, 

 classification, and culture; culture of the sweet pea for seeds; culture of sweet 

 peas under glass ; diseases of greenhouse sweet peas ; field diseases of sweet 

 peas; diseases not yet known in America; insect pests; diseased seeds; physio- 

 logical diseases ; methods of control ; and spraying. 



The ornamental trees of Hawaii, J. F. Rock {Honolulu, Hawaii: Author, 

 1917, pp. V+210, pis. 2, figs. 79). — Descriptive accounts are given of the orna- 

 mental trees and shrubs of Hawaii, including references to fruit trees and 

 ornamental vines. The plants treated or mentioned in the volume have been 

 identified and are represented by specimens in the College of Hawaii herbarium. 

 The author points out that it is possible that a few introduced and indigenous 

 species as yet not identified or unheard of may not be included in the present 

 work. 



A bud variation of Pittosponim. A. D. Shamel {Jour. Heredity, 8 {1917), 

 No. 8, pp. 557, 558, fig. 1). — The author illustrates and describes bud sports 

 occurring in the ornamental hedge plant Pittosporum tobira varicgatum for the 

 purpose of calling attention to the possibility of studying and utilizing bud 

 variations for the propagation of valuable commercial varieties of ornamental 

 plants. 



Hints on landscape gardening. Prince von PttcKLEB-MrsKAU. trans, by B. 

 SiCKERT, edited by S. Parsons {Boston: Houghton Mifflin Co., 1917, pp. XLr+ 

 196, pis. SS). — The present work comprises the second of a series of books 

 (E. S. R., 19, p. 1042) undertaken at the suggestion of and with the cooperation 

 of the American Society of Landscape Architects. 



In part one of the present work the author pre'jents hints on landscape gar- 

 dening based upon the results secured in developing his private park at Muskau, 



