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544 EXPERIMENT STATION RECORD. [Vol.43 



History of Spruce Production Division: United States Army and United 

 States Spruce Production Corporation {Portland, Orey.: U. iS'. Army and 

 U. S. Spruce Prod. Corporation [191S], pp. lX-{-127, pis. 32, flys. 11).— A his- 

 torical account of the activities of the Spruce Production Division in the ex- 

 ploitation of spruce forests and the preparation of aircraft lumber for the 

 United States and the Allies during the world war. 



DISEASES OF PLANTS. 



Sexual fusions and development of the sexual organs in the Perider- 

 miums, J. F. Adams {Pennsylvania Sta. Bui. 160 {1919), pp. 31-77, /iys. 13).— } 

 Ilesults are given of a study on the sexual cell fusions and development of tliei 

 secidium in five species of Peridermiums, Pcrldoniium coinptonioE, P. pyrifurme, 

 P. acicohim, P. peckii, and P. balsameum. 



Infection studies with graft hybrids, H. Klebahn {Flora [Jena], n. ser., 

 11-12 {1918), pp. 418-430, fiys. 9). — This work includes experimentation with 

 a number of graft hybrids as to the behavior of the constituents as such (wliether 

 outer or inner) towards infection. Notes are given of tests involving the fungi 

 Septoria lycopersici and Cladosporium fulvum, and the chimeras Solannm tubin 

 gense, S. koelrevtcriannm, S. proteits, and S. gaertnerianum, besides other plants, 



A general conclusion reached is that the cliimeras are not protected against 

 infection when the susceptible member is covered only with the epidermis o: 

 the nonsusceptible component. 



Copper sprays, L. Ravaz {Prog. Ayr. et Vit. {Ed. I'Esf-Ccntre), JfO {1919) 

 Nos. 16, pp. 361-370; IS, pp. .'(09-416, figs. 5).— The first section of this coa 

 tribution deals with Burgundy, the second with Bordeaux mixture, the prepara 

 tion, properties, employment, and values of these fungicides being systematically 

 discussed. 



Lime-sulphur sprays, Yermorel and Dantony {Prog. Agr. et Vit. {Ed. 

 VEst-Centre), 40 {1919), Nos. 15, pp. 343-345; 17, pp. 393-398; 18, pp. 420-424; 

 20, pp. 469-473). — This series deals with matters related to tlie chemical com 

 position of lime sulphur; the action of sulphur on lime in the mixture and the 

 cgmpounds formed as determined by temperature, time, proportion, dilution 

 and the presence of magnesia ; analyses to determine the different constituents 

 and their proportions and changes therein ; the action of oxygen ; and the mode 

 of operation of the lime-sulphur mixture. The re.sults of tests are tabulated 

 with discussion. 



Notes on New York plant diseases, II, F. G. Stewart {New York State 

 Eta. Bui. 463, pop. ed., {1919), pp. 9, pis. 2, fig. 1). — Tliis is a popular edition 

 of the bulletin previously noted (E. S. R., 42, p. 349). 



Diseases of economic plants in Porto Rico, .1. A. Stevenson {Rev. Ayr. 

 Puerto Rico, 2 {1918), No. 1, pp. 19-27; 2 {1919), No. 2, pp. 23-33).— This is a 

 list, partly descriptive, of the fungus and other diseases attacking economic 

 plants in Porto Rico. 



Diseases of cotton, quince, and apple {Bol. Agr. [Sao Paulo], 20. scr.. No 

 4 {1919), pp. 90, 91). — Quince is attacked by Glccosporium cydoniw and Cerco- 

 spora tomenticola, and apple by G. fructigenum, causing injuries which are de 

 scribed. These diseases may be controlled by Bordeaux mixture at a strengtl] 

 of 1 per cent for both copper and lime constituents. Cotton is attacked as te its 

 leaves by Cercospora sp. and Ramularia a&rea. 



New [plant] diseases, T. A. C. Schoevers {Tijdschr. Plantenziekten, 25 

 (1919), Nos. 2, pp. 95-98; 3, pp. 126-128). — Brief discussion is given of diseases, 

 supposedly new, of spinach, tomato, aster, wallflower, petunia, and Gilia tricolor, 



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