DISEASES OF PLANTS. 347 



be cut for pulpwood when 15 years old and for timber and veneer in 35 years. 

 To the owner of unprotected bottom laud it should appeal as a profitable tree to 

 grow in the region, especially on the extensive areas outside the river levees. 



Osier culture, H. Lati£:re (La Culture de V Osier. Paris, 1912, pp. 122, ij/.-*. 

 3). — A practical guide to the establishment, care, and management of osier 

 plantations, including also information relative to the preparation and market- 

 ing of the osiers. 



The rosewood of Guiana and its essential oil, E. BASSii;:RES (Le Dais de Rose 

 de la Guyana ct sun Huilc EsscnticUc. Paris, 1913, pp. 41, figs. 9). — A botanical 

 study of the rosewood {Licaria guianensis), including an account of the distilla- 

 tion of rosewood oil. A note by A. Berteau is also given on the macroscopic, 

 histologic, and microchemic characters of the rosewood. 



Rubber and rubber planting", R. H. Lock (Camhridgc, England, 1913, pp. 

 XIII-]-245, pis. 10, figs. 22). — This is an introductory treatise on the subject, in 

 which the author discusses the histoiy of the use and cultivation of rubber, the 

 botanical sources of rubber, the physiology of latex production and tapping ex- 

 periments, planting operations, harvesting, factory work on the estate, the pests 

 and diseases of Ilevea, the cultivation of species other than Ilcvea hrasiliensis^ 

 the chemistry of India rubber, and the manufacture of rubber goods. 



Annual return of statistics relating- to forest administration in British 

 India, 1911-12 (Stat is. Forest Admin. Brit. India, 1911-12, pp. 27, pi. 1).— 

 The statistics here reported deal with alterations in forest areas, progress in 

 forest settlements, forest surveys and forest working plans, forest protection, 

 planting operations, yields in major and minor forest products, revenues, expen- 

 ditures, etc. Statistical diagrams indicating some results of forest administra- 

 tion in British India are appended. 



Annul report of the director of forests, N. W. Jolly (Ann. Rpt. Dir. Forests 

 [Queensland], 1912, pp. 5). — This is a report for the calendar year 1912 relative 

 to the administration and management of the state forests and national parks in 

 Queensland, including data relative to forest areas, revenues, expenditures, etc. 



The estimation of accretion in forest management systems, G. Baadek (Die 

 Vcranscldagung dcs Zuicachscs l)ci Waldertragsregelungen. Inaug. Diss., XJniv. 

 (jiessen, 1913, pp. 57, fig. 1). — A doctorate dissertation on this subject presented 

 to the philosophic faculty of the University of Giessen. 



A new dendrometer or timber scale, J. F. Clark (Forestry Quart., 6 (1913), 

 No. 4, pp. 467-469, pi. 1). — The dendrometer here described and illustrated is a 

 direct reading instrument, both as regards the height and diameter measure- 

 ments of the tree. 



The air-seasoning of timber, W. H. Kempfee (Bui. Amer. Ry. Engin. Assoc., 

 15 (1913), yo. 161, pp. 161-231, figs. 63; abs. in Engin. Rec., 69 (1914), No. 2, p. 

 53). — In the present paper the author has collected the data on air-seasoning 

 which has appeared in various circulars and bulletins of the Forest Service of 

 the U. S. Department of Agriculture and has arranged them, together with 

 data secured elsewhere, so that the results of various tests are comparable 

 with one another. 



The development and status of the wood-preserving industry, E. A. Ster- 

 ling (Sci. Amer. Sup., 76 (1913), No. 1958, pp. 24-27, figs. 9).— Notes and illus- 

 trations on the art as practiced in America are presented. 



DISEASES OF PLANTS. 



The fungi which cause plant disease, F. L. Stevens (New York, 1913, pp. 

 IX-{-754, figs. 440)- — This book is intended as an introduction to the study of 

 the more important cryptogamic parasites that affect economic plants in the 



