646 EXPEKIMENT STATION EECOED. 



Himalayan junipers is reported. The chief points of interest brought out are 

 the shortness of the tracheids of all species, the resinous nature of the medullary 

 rays, the distribution of the resin cells in the annual ring, and the nature of the 

 rims above and below the pit areas, these being shown to agree with those of 

 the East Indian pines in being of the nature of pectin and not cellulose. 



Relationships of the white oaks of eastern North America, with an intro- 

 ductory sketch of their phylogenetic history, Margaeet V. Cobb (Proc. Amer. 

 Phil. Soc, 54 (1915), No. 211, pp. 165-175, pis. 3, fig. i).— This article contains 

 a reconstruction of tlie history of the Fagacese and of Quercus, together with a 

 key showing the relationships of the white oaks of eastern North America. A 

 bibliography of related literature is included. 



Discussion on the eucalypts and their products, H. G. Smith (Rpt. Austral. 

 Assoc. Adv. Sci., U {1913), pp. 116-125).— A discussion of the essential oil 

 products of the eucalypts with reference to their tanning capabilities and other 

 avenues of possible utilization. 



Culture of Manihot glaziovii at the State Agricultiiral Station at Bokala, 

 Middle Kongo, Janssens (Bui. Agr. Congo Beige, 5 {1914), No. 3, pp. 416-456, 

 figs. 17). — An account of cultural, tapping, and coagulation work with M. 

 glaziovii rubber at the station, including estimates relative to the cost of estab- 

 lishing a rubber plantation and the probable returns, and a discussion of the 

 diseases and other enemies of Manihot. 



The treatment to which the Para rubber trees of the Botanic Gardens, 

 Singapore, have been subjected {Gard. Bui. Straits Settlements, 1 {1915), 

 No. 8, pp. 247-295, pis. 4). — An account of the early distribution of Para rubber 

 plants in the Tropics and their introduction and culture in Singapore, with 

 special reference to tapping experiments. Data are given on various tapping 

 experiments conducted in the Botanic Gardens, together with tabular data on 

 seed-bearing trees in the garden and the seed crop over a long series of years. 



Battan supply of the Philippines, J. R. Abnold (f7. S. Dept. Com., Bur. 

 Foreign and Dom. Com., Spec. Agents Ser., No. 95 {1915), pp. 40).—K statistical 

 report on the supply of Philippine rattan and its suitability as to quality, cost 

 of exploitation, etc., for placing in quantities on the export market. The data 

 were collected principally by the Philippine Bureau of Forestry. 



Wood-using industries of the Prairie Provinces, R. G. Lewis ond W. G. H. 

 BoYCE {Dept. Int. Canada, Forestry Branch Bui. 50 {1915), pp. 75, figs. 17). — 

 This report contains an account of the quantity, value, and source of supply 

 of the different kinds of wood used by the industries of the Provinces of 

 Manitoba, Saskatchewan, and Alberta. It includes detailed descriptions of the 

 different classes of industries and of the properties of the different woods used 

 In these industries. A discussion of the possible uses of the native woods of 

 these Provinces and a classified list of the commodities manufactured from 

 different woods are appended. 



DISEASES OF PLANTS. 



The vegetable parasites of cultivated or useful plants, T. Ferraris (/ 

 Parassiti Vegetali delle Piante Coltivate od TJtili. Milan: Ulrico Eoepli, 1915, 

 pp. XII +1033, app. pp. XIX, pi. 1, figs. i85).— This edition differs from the 

 first (E. S. R., 29, p. 644) chiefly in having an appendix dealing briefly with 

 some recent articles on parasitic bacteria and fungi. 



Fungus diseases, J. P. Anderson {Alaska Stas. Rpt. 1914, pp. 26, 27). — 

 Notes are given on a number of diseases of economic crops observed during the 

 year. The author states that the most injury is caused by Botrytis cinerea 



