DISEASES OF PLANTS. 47 



Bul. 40, 191S, pp. 67, pi. 1). — A statistical report on the manufacture of lumber, 

 square timber, lath, and shingles in the Dominion and the various Provinces 

 for the calendar year 1912. The ijroduction is also indicated by species. 



The total value of lumber, square timber, lath, and shingles produced in 

 Canada in 1912 was $76,540,879, of which amount the lumber represents about 

 $09,500,000. 



To get long life from untreated timber in trestles {En^in. Rec, 68 {1913), 

 No. 20, p. 542). — This comprises suggestions made by the committee on the 

 preservation of timber of the American Railway Bridge and Building Associa- 

 tion relative to methods of prolonging the life of overhead timber and piles used 

 in trestle work which receive no preservative treatment. A table is also given 

 showing the relative length of life of various structural timbers in contact with 

 the soil and in the air. 



DISEASES OF PLANTS. 



Smut diseases of cultivated plants, their cause and control, H. T. Gussow 

 (Canada Cent. Expt. Farm Bul. 73, pp. 57, figs. 9). — After a general discussion 

 of smuts as related to plants, the author describes the smuts of wheat, barley, 

 oats, corn, broom corn, and millet, giving methods for their control, as far as 

 definite recommendations can be made. 



Further cultures of heteroecious rusts, W. P. Fraseb (Mycologia, 5 (1913), 

 No. 4, pp. 233-239). — The author adds to studies previously reported (E. S. R., 

 28, p. 51) an account of 5 rusts of the genus Uredinopsis whose life histories 

 are claimed to be established for the first time; and, in addition, 3 life histories 

 supplementing previous work. 



Some important contributions on fungus diseases of plants appearing in 

 1912-13, E. RiEHM (Mycol. Centhl., 3 {1913), No. 2, pp. 66-76) .—Bvief notes 

 are given of studies on plant diseases in 1912-13, concluding with a list of about 

 SO articles representing about 70 different contributors. 



Diseases of agricultural crops, 1912, J. Lind, Sofie Rosteup, and F. K. 

 Ravn {Tidsskr. Landbr. Plantcavl, 20 {1913), No. 2, pp. 249-280) .—The more 

 important plant diseases and insect pests observed in Denmark during the year 

 are described and discussed. 



"Work of the phytopathological section of the central agricultural ex- 

 periment station in Stockholm in 1912, J. Eriksson {Inio-nat. Inst. Agr. 

 [Rome], Mo. Bul. Agr. Intel, and Plant Diseases, 4 {1913), No. 7, pp. 1005- 

 1008). — A condensed account is given of observations carried out on potato 

 diseases, including Phytophthora infestans, Hypochnus solani or Rhizoetonia 

 solani, and Chrysophlyctis endohiotica or Synchytrium solani; on beet diseases, 

 including Uromyees betw, Bacillus tahiflcans, R. violacea, Phoma betw, Cerco- 

 spora beticola, Sporidesmium putrefaciens, etc. ; on withering of blooms on 

 fruit trees; and on various diseases of vegetables. A list of the station publi- 

 cations jippearing in 1912 is also given. 



Work of the observatory of phytopathology in Turin, P. Voglino 

 {Internat. Inst. Agr. [Rome], Mo. Bul. Agr. Intel, and Plant Diseases, 4 {1913), 

 No. 7, pp. 1000-1005). — This is a brief account of the organization of this 

 institution, and of parasitic fungi, etc., studied there, by years from 1904 to 

 1912. 



Plant diseases, E. W. Davy (Nyasaland Dept. Agr. Ann. Rpt. 1913, pp. 23, 

 24)' — Brief notes are given on the occurrence of frog-eye of tobacco due to 

 Cercospora nicotiancB, the attack of safflower by a species of Vermicularla, a 

 disease of Ceara rubber tree due to some species of Polyporaceae as yet unde- 

 termined, and the orange scab caused by Cladosporium citri. The presence of 



