298 



Mycologia 



Rosenbaum, J., & Ramsey, G. B. Influence of temperature and 

 precipitation on the blackleg of potato. Jour. Agr. Research 

 !3: 507-5I3- 3 Je 191&. 



Seaver, F. J., & Home, W. T. Life-history studies in Sclerotinia. 

 Mem. Torrey Club 17:202-206. pi. 3. 10 Je 1918. 



Sclerotinia Geranii sp. nov. is described. 



Smith, E. F., Godfrey, G. H. Brown rot of Solanaceae on Ri- 

 cinus. Science II. 48: 42, 43. 12 Jl 1918. 



Steinberg, R. A. A study of some factors influencing the stimu- 

 lative action of zinc sulphate on the growth of Aspergillus 

 niger, I. The effect of the presence of zinc in the cultural 

 flasks. Mem. Torrey Club 17:287-293. 10 Je 1918. 



Stevens, H. E. Lightning injury to citrus trees in Florida. Phy- 

 topathology 8:283-285. /. /. Je 1918. 



Stevens, N. E., & Wilcox, R. B. Further studies of the rots of 

 strawberry fruits. U. S. Dept. Agr. Bull. 686:1-14. 24 Je 

 1918. 



Stone, R. E. Common edible and poisonous mushrooms of On- 

 tario. Ontario Dept. Agr. Bull. 263 : 1-24. Je 1918. 



Taubenhaus, J. J. Pox, or pit (soil rot), of the sweet potato. 

 Jour. Agr. Research 13 : 437-450. pi. 51, 52. 27 My 1918. 



Weir, J. R. Experimental investigations on the genus Razoumof- 

 skya. Bot. Gaz. 66: 1— 31. /. 1-19. 15 Jl 1918. 



Weir, J. R. Forest disease surveys. U. S. Dept. Agr. Bull. 658 : 

 1-23. /. 1-23. 12 Je 1918. 



Weldon, G. P. Pear growing in California. Month. Bull. State 

 Comm. Hort. Calif. 7:222-410. /. 1-186. My 1918. [Illust.] 



Contains chapter on diseases of pears. 



Young, V. H. Some factors affecting inulase formation in As- 

 pergillus niger. Plant World 21:75-87. Ap 1918. . 



