48 SELMAN A. WAKSMAN AND JACOB S. JOFFE 



Gillespie, L. 1918 The growth of the potato scab organism at various hydro- 

 gen ion concentrations as related to the comparative freedom of acid 

 soils from the potato scab. Phytopathology, 8, 257-269. 



Hoagland, L. R. 1918 The relation of the plant to the reaction of the nutrient 

 solution. Science, N. S., 48, 422. 



Ltjtman, B. F., and CUNNINGHAM, G. C. 1914 Potato Scab. Bull. 184, Vt. 

 Agricultural Experiment Station. 



Malfitano, G. 1900 Ann. Inst. Pasteur, 14, 60, 420. 



Michaelis, L., and Marcora, F. 1912 The Saureproduktivitat des Bacterium 

 coli. Ztschr. Immunitatsforschung u. Exp. Ther., 14, 170-173. 



Mtjnter, F. 1913 tJber Aktinomyceten des Bodens. I. Centrbl. Bakt. Abt. 2, 

 36, 365-381. 



Waksman, S. A. 1918 The occurrence of Azotobacter in cranberry soils. 

 Science, N. S., 48, 653-654. 



Waksman, S. A. 1919 Studies in the Metabolism of Actinomycetes. Jour. 

 Bact., 4, 189-216, 307-330. 



