114 



Mycologia 



Schmitz, H., & Zeller, S. M. Studies in the physiology of the 

 fungi — IX. Enzyme action in Armillaria mellea Vahl. 

 Daedalea confragosa (Bolt.) Fr. and Polyporus lucidus 

 (Leys.) Fr. Ann. Missouri Bot. Gard. 6: 193-200. pi. 4, f. 

 1-12. S 1 91 9. 



Schultz, E. S., and others. Investigations on the mosaic disease 

 of the Irish potato. Jour. Agr. Research 17 : 247-274. pi. A, 

 B, 25-30. 15 S 1919. 



Sears, F. C. Productive orcharding, i-xiv -(- 1-315. /. 1-155. 

 Philadelphia. 4 Mr 1919. 



Second edition revised, contains chapter on diseases of trees. 



Shapovalov, M. Is the common potato scab controllable by a 

 mere rotation of crops? Phytopathology 9: 422-424. /. 1. S 

 1919. 



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

 lation of the growth of Aspergillus niger. Am. Jour. Bot. 6 : 

 330-356. 20 N 1919; 357-372. N 1919. 



Stevens, F. L. Foot-rot disease of wheat. Historical and 

 bibliographic. Illinois Nat. Hist. Surv. Bull. 13: 259-286. /. l. 

 O 1919. 



Turley, H. E. New fruit fungi found on the Chicago market. 



Science II. 50: 375, 376. 17 O 1919. 

 Vogel, I. H. A rose graft disease. Phytopathology 9 : 403-412. 



/. 1-6. S 1 91 9. 



Webb, R. W. Studies in the physiology of the fungi — X. Germ- 

 ination of the spores of certain fungi in relation to hydrogen- 

 ion concentration. Ann. Missouri Bot. Gard. 6 : 201-222. /. 

 1-5. 11O1919. 



West, E. An undescribed timber decay of hemlock. Mycologia 

 11 : 262-266. 18 O 1919. 



Weir, J. R. Pathological marking rules for Idaho and Montana. 

 Jour. Forestry 17: 666-681. O 1919. 



Weir, J. R., & Hubert, E. E. A study of the rots of western 

 white pine. U. S. Dept. Agr. Bull. 799: 1-24. 10 N 1919. 



Zeller, S. M., & Schmitz, H. Studies in the physiology of the 

 fungi — VIII. Mixed cultures. Ann. Missouri Bot. Gard. 6 : 

 183-192. pi. 4. 11 O 1919. 



