142 EXPERIMENT STATION RECOED. 



Forest fires and their prevention, including forest fires in North Carolina 

 during 1910, J. S. Holmes (N. C. Geol. and Econ. Survey, Econ. Paper 22, 

 1911, pp. JfS). — This comprises comparative statistics of forest fires in North 

 Carolina for 1909 and 1910, together with a discussion of the causes of forest 

 fires and of preventive, protective, and educational measures. The statistics for 

 1910, which cover one-thii'd of the townships of the State, show an estimated 

 area of 580,000 acres of woodland burned over, with a consequent loss of over 

 half a million dollars in timber and personal property. 



Method of distinguishing powellized and the unpowellized wood, P. Singh 

 (Indian Forester, 37 (1911), No. 10, pp. 567, 56S).— The method described con- 

 sists of a test for arsenic, a small quantity of which enters into the composition 

 of the powellizing solution (E. S. R., 19, p. 848). 



Wood pulp and its uses, C. F, Cross, E. J. Bevan, and R. W. Sindall (Lon- 

 don, 1911, pp. XI +270, figs. 37). — This work, which comprises a general account 

 of the evolution of the wood pulp industries, is based on both scientific and 

 practical studies in the domain of cellulose. The successive chapters discuss 

 the structural elements of wood, physical properties, chemical composition, wood 

 pulps in relation to sources of supply, the manufacture of mechanical wood 

 pulp, chemical wood pulp, news and printings, wood pulp boards, the utilization 

 of wood waste, testing wood pulp for moisture, and wood pulp and the textile 

 industries. 



In order to bring out the position of wood pulps, in their various forms, as 

 staple paper making raw material, a chapter is given which embodies specimen 

 sheets of paper selected as types, with a description of their characteristics. A 

 brief bibliography is appended. 



DISEASES OF PLANTS. 



Plant diseases (phytopathology), A. A. IAchevskh (BoUensni rastemi 

 (fitopaiolog'ita), St. Petersburg, 1910, vol. 1, pp. 1,56, table 1, figs. ]17).—Th\s 

 book, which is printed in the Russian language, treats of the general influence 

 of pathological factors on plants, the predisposition of plants to disease, the 

 geographical distribution of fungi and means by which they are spread, reme- 

 dies and methods for treatment, and directions for the collection and prepara- 

 tion of material for a study of plant diseases. 



Investigations in plant diseases, H. C. Mtjlleb, K. Stoemer, et al. (Ber. 

 Agr. Ghetn. Kontroll u. Vers. Stat. PftansenkranJc. Proiy. Sachsen, 1910, pp. 

 71-81/, fig. 1). — ^A report is given of miscellaneous investigations of plant dis- 

 eases carried on during the year, including the diseases of grain, particularly 

 means for preventing smut, and the diseases of beets, potatoes, and other 

 vegetables. 



Origin of heteroecism in the rusts, E. W. Olive (Phytopathology, 1 (1911), 

 No. 5, pp. 139-11,9). — The author presents a contribution to the problem as to 

 which of the two hosts is to be considered as the primary and which the sec- 

 ondary host of rusts. He believes that the plants which bear the gametophytic 

 form of the rusts are the primary hosts of the hypothetical autoecious ancestors 

 of rusts. 



A preliminary report on the yearly origin and dissemination of Puc- 

 cinia graminis, F. J. Pritchard (Bot. Gas., 52 (1911), No. 3, pp. 169-192, pi. 

 1). — The results of a study of rust epidemics at the North Dakota Station are 

 given. 



The author found that P. graminis passed readily from wheat, Agropyron 

 tenerum, A. repens, Hordeum jubatuni, and Elymus triticoides to the barberry. 

 His observations tended to oppose the theory that the secidiospores and uredo- 



