1917] HORTICULTURE. 835 



Orange culture, A. de MAzrfcEES {La Culture des Orangers. Paris: J. B. 

 Baillidre d Sons, 1917, pp. 96, figs. 28). — A small treatise on the planting, cul- 

 ture, harvesting, and marketing of oranges. 



The fig in Texas, A. T. Potts (Texas Sta. Bui. 208 {1911), pp. 41, figs. 13).— 

 A treatise on fig growing, with special reference to the development of the 

 industry in Texas. Information is given relative to the climatic requirements 

 of the fig, propagation, varieties, soil and its preparation, planting, culture, prun- 

 ing, fertilizers, insects and diseases, splitting and souring, harvesting and mar- 

 keting fresh fruit, preserving and drying, and the Smyrna fig and caprification. 



The subject matter is based upon observations made in Texas and upon the 

 industry as developed in other sections of the United States. 



The guavas of the Hawaiian Islands, V. MacCaughey {Bui. Torrey Bot. 

 Club, 44 {1917), No. 11, pp. 51S-524). — A descriptive account of the species and 

 forms of guavas established in the Hawaiian Islands. 



The pollination of the mango, W. Popenoe {U. 8. Dept. Agr. Bui. 542 {1917), 

 pp. 20, pis. 4, fig. 1). — This bulletin reports pollination studies conducted at 

 Miami, Fla., during 1915 and 1916 to throw some light on the failure of many 

 of the best imported varieties of mangoes to fruit satisfactorily in Florida. 

 The flower structure, pollen, process of pollination, production of fruit, and flow- 

 ering habits of the mango are considered in detail. 



The author's experimental work shows that the mango requires pollination 

 for the production of fruit and is benefited by cross-pollination, though nor- 

 mally self-fertile. The exclusion of insects is detrimental to pollination, but 

 even in the presence of insects a large proportion of the stigmas ai-e unpollinated 

 and comparatively few stigmas receive more than one or two grains of pollen. 

 Hand pollination with an abundance of pollen failed to improve fruit production. 



The failure to set fruit is not deemed to be due to any morphological defect 

 in the pollen or to defects in the mechanism of pollination, hence it is concluded 

 that the problem is a physiological one connected with nutritional conditions, as 

 influenced by changes in soil moisture and food supply, principally the former. 

 Experiments have been undertaken in cooperation with E. J. Kraus, of the 

 Oregon Experiment Station, who is working with pomaceous fruits, to test the 

 practicability of inducing the formation of flower buds through ringing, girdling, 

 and banding the limbs with wire. 



Some results with oil palm (Elaeis guineensis), W. M. van Helten {Dept. 

 Landb., Nijv. en Handel [Dutch East Indies], Meded. Cultuurtuin, No. 8 {1917), 

 pp. 22, pi. 1 ) . — Data are given showing the yields of nuts and oil secured in 1916 

 from oil palms growing in the Buitenzorg Gardens and vicinity. These yields 

 are compared with yields secured in other countries. Notes are also given on 

 methods of propagation and planting the oil palm, based upon tests conducted 

 at Buitenzorg and elsewhere. 



Coffee in Abyssinia, A. Spalletta {Agr. Colon. [Itdlyl, 11 {1917), Nos. 1, 

 pp. 70-88; 2, pp. 111-1S2, pis. 2; 3, pp. 196-222, pi. 1; 4, pp. 284-297).— An ac- 

 count of the coffee industry in Abyssinia, including a discussion of varieties, 

 soil, and climate, cultural details, harvesting and preparation for market, com- 

 merce, transportation, and the future of the industry. A bibliography of re- 

 lated literature is appended. 



A review of coffee plantings in the Buitenzorg experimental garden, C. J. 

 J. VAN Hall and W. M. van Helten {Dept. Landb., Nijv. en Handel [Dutch 

 East Indies'], Meded. Cultuurtuin, No. 7 {1917), pp. 50, pis. 8). — Notes are given 

 on the character and condition of plantings of various species, hybrids, and 

 varieties of coffee under observation at Buitenzorg. 



The germination and selection of tea seed, C. Bernard {Indian Tea Assoc., 

 Sci. Dept. Quart. Jour., No. 1 {1917), pp. 1-12, pi. 1). — A translation of an ar- 



