Waksman — xvi — Actinomycetes 



Figure 30.— Typical growth of soil species of Stre-ptomyces on synthetic 



media 132 



Figure 31.— Relation between density of vegetative mycelium and plate 



counts of actinomycetes 136 



Figure 32.— Different forms of scale produced by S. scabies .... 156 



Figure 33.— The relation of soil reaction to the occurrence of potato scab 162 



Figure 34.— Influence of the hydrogen-ion concentration on the growth 



of the potato scab organism 165 



Figure 35.— Vegetative mycelium of a pathogenic anaerobic actinomyces 172 



Figure 36.— Actinomycosis of lymphatic gland showing granule with my- 

 celial network and peripheral growing edge 174 



Figure 37.— An early study of the structure of an actinomyces colony from 



a bronchopneumonic nodule 178 



Figure 38.— The appearance of a Nocardia in the sputum of an infected 



patient 181 



Figure 39.— First use of the generic name Actinomyces C 1877/78) . . 198 



Mycology is the Cinderella of Botany and has suffered the dis- 

 advantages of ste-p-sisterhood. The rest of the family at one time or 

 another has received recognition, and occasionally with little warrant 

 except that of importunity. But Cinderella is now ftdly attired for 

 the Ball. Indeed the carriage is waiting. She has all the character- 

 istics which usually attract in that she has developed in a comely 

 manner and has charms of which her devotees are aware, and— 

 she can bring her quiver fidl of rations for the general good. May 

 those who have served her faithftdly benefit for their devotion. . . . 

 (J. Ramsbottom). 



