DISEASES OF PLANTS. 781 



called to the fact thai under the present law the timber can not be removed, but 

 remains to ultimately fall to the ground and serves to add fuel to future lires. 



Winter logging, R. V. R. Reynolds [Forestry and Iirig., 10 {J904), No. 1, pp. 

 20-J!>, ffjK. <s'). — A popular description is given of the methods pursued in some of 

 the lai'ger logging camps in the Northwest. 



American Forestry Association [Forealrii and Irrig., 10 [190~'j), No. 1, pp. 

 12-19). — An account of the twenty-second annual meeting of this association, held in 

 Washington, I). C, December 9, 1903. In the director's report which was submitted 

 to the association, a review is given of the forestry situation in this country, and the 

 work of the Bureau of Forestry and General Land Office of the Federal Government 

 and of various States in forest investigations are briefly described. 



DISEASES OF PLANTS. 



Some diseases of cultivated, plants, F. Corboz {Bid. Soc. Vaud. Agr. et YU., 

 LausaiDic, lOOo, No. 165, pp. 407-412). — A" brief description is given of a number of 

 mildews of cultivated plants, particular attention being paid to those belonging to 

 the genus Peronospora. For the prevention of these the author recommends the 

 thorough use of Bordeaux mixture. Notes are also given on smuts of cereals, for the 

 prevention of which treating the seed with si^rong solutions of copper sulphate or 

 subjecting to water heated to a temperature of 50 to 55° C is recommended. 



Cultures of the TJredinese in 1903, J. C. arthur {Jour. MycoL, 10 {1904), No. 

 69, pp. S-21). — This report is in continuation of a series upon cultures of plant rusts, 

 and embraces experiments which were inaugurated in 1899. During the season 

 covered by the report 68 collections of materials were empk yed. Out of these a 

 large number refused to germinate. As in the previous years, success was attained 

 only when reciprocal inoculations were made between plants whose proximity to 

 one another in the field gave definite clues to their possible relationship. A detailed 

 report is given of the different experiments, and in conclusion a list is given of 5 

 species which have been previously reported and 8 whose different host plants are 

 reported for the first time. 



Index to uredineous culture experiments, with list of species and hosts for 

 North America, I, AV. A. Kei.lerman {Jour. MycoL, 10 {1904), No. 69, pp. 26-45).— 

 An aljjhabetical index is given in which the host plants of a number of rusts are 

 shown, together with the name of the author having made the culture experiments. 



Potato spraying experiments in 1903, F. C. Stewart, H. J. Eustace, and 

 F. A. SiRRiNE (A>») York State Sta. Bid. 241, pp. 251-292, pis. 12). — An account is given 

 of the spraying experiments conducted under the 10-year spraying investigations, the 

 plan of which was outlined in a previous bulletin (E. S. R., 14, p. 875). These experi- 

 ments were conducted at the experiment station at Geneva and at Riverhead, Long 

 Island, the efficiency of a different number of applications being comjiared. In 

 addition, cooperative experiments were conducted with 6 farmers in different parts 

 of the State, to determine the net profit in spraying potatoes under ordinary farm 

 conditions. The fungicide used was Bordeaux mixture, and to prevent serious injury 

 by leaf hoppers and potato bugs Paris green or a solution of white arsenic was added 

 to the fungicide used in some of the sprayings. Comparisons were made between 3 

 applications during the growing season and spraying every 2 weeks. 



At the exijeriment station, as well as other points where the experiments were 

 conducted, there was little injury from the early blight, but the late blight, I'hytoph- 

 thora infestans, proved quite destrut^tive. The effect of the spraying was markedly 

 shown by the prolonged growing season of the treated plants, and when harvested it 

 was found that the yields were increased in proportion to the number of applications 



