42 EXPERIMENT STATION RECOED. 



On the composition of flexible and rigid carnation stems, L. Fondard aud 

 F. Gauthie iCompt Rend. Acad. Sci. [Paris], 151 (1910), No. 8, pp. 502-504).— 

 Analyses are given showing the chemical composition of both stiff and flexible 

 carnation stems. The content of dry matter, nitrogen, phosphoric acid, and 

 potash was found to be considerably greater in the stiff stems, whereas there 

 was a higher lime content in the flexible stems. 



On studying the respective composition of the leaves and stems of each va- 

 riety analyzed, it was found that although the leaves were much richer in 

 nitrogen, potash, and lime than the stems, they were poorer in phosphoric acid. 

 The authors therefore suggest that with a view to producing an abundance of 

 flowering stems it may be well to pay more attention to the importance of 

 phosphoric acid as a carnation fertilizer. 



FORESTRY. 



How to know the trees, H. Irving (London, New York, and Melbourne, 1910, 

 pp. VI+179, pis. 111). — This book consists of popular descriptions with illus- 

 trations of trees commonly met with in Great Britain. 



Trees and shrubs of the British Isles, C. S. Cooper and W. P. Westell 

 (London and New York, 1909, vols. 1, pp. XXXII+LXXXIV+108; 2, pp. 

 ^'III+260, pis. 86). — This work has been prepared as a means for identifying 

 not only the trees and shrubs native to the British Isles but also the more com- 

 mon cultivated trees and shrubs. 



Over 550 species are described under the headings of flowers, inflorescence, 

 fruit, foliage, mode of growth, and winter buds. Each plant is arranged under 

 its natural order, the characteristics of which precede each group. The intro- 

 duction contains considerable general information relative to the habitat, form, 

 structure, beauty, uses, etc., of trees and shrubs. A calendar showing the 

 average dates of flowering in mild latitudes, together with a number of lists of 

 trees and shrubs for certain soils and situation^, is given, and several chapters 

 preceding the descriptions discuss injurious and useful insects, galls, fungus 

 pests, and fungicides aud insecticides. 



[Timber trees of Cuba] (Mem. Admin. Pres. Repuh. Cuba, 1909, insert, quarto 

 2, facing p. 2.'i2). — A descriptive list is given of 112 timber trees of Cuba show- 

 ing their common and scientific names, origin, height, range, uses of the timber 

 and other products, and the class, specific weight, and color of the timber, to- 

 gether with coefiicients of fracture, elasticity, compression, and flection. 



Statistics of Danish forests, C. H. Finch (Quart. Jour. Forestry, 4 (1910), 

 No. 4, pp. 300-305, pi. 1). — A brief statistical report on the forests and forest 

 administration in Denmark. 



Beech, oak, and hornbeam high forest in France, A. Smythies (Quart. Jour. 

 Forestry, Jf (1910), No. Jf, pp. 215-293, pis. 6). — ^A descriptive account of the 

 Forest of Retz, discussing its situation, area, history, climate, geology and soil, 

 enemies, and the details of its administrative policy. 



Shortleaf pine (Pinus echinata) (U. S. Dept. Agr., Forest Serv. Circ. 182, 

 pp. 4). — This circular discusses the shortleaf pine (P. echinata) relative to the 

 form and size of trees grown in plantations, planting range, soil requirements, 

 uses of the wood, seed bed, nursei'y and planting operations, and yield of 

 plantations. 



Loblolly pine (Pinus taeda) (U. S. Dept. Agr., Forest Serv. Circ. 183, pp. 

 Jf). — The discussion of this species is quite similar to that noted above for the 

 shortleaf pine (P, echinata). 



