MICHIGAN ACADEMY OF SCIENCE. 



297 



Table 5. 



Growtli on Nutrient Agar and Vegetables: Test-tube Cultures. 



6 days. 



Oat meal Agar well covered with a 



agar. dark growth. Spores being 



formed in abundance. Some 

 dark gray aerial mycelium. 



Prune juice Growth not as heavy as 



agar. above; spores being formed; 



aerial mycelium dark gray. 



Corn meal Good growth about same as 



agar. on prune agar. Color greenish- 



black. Mycelium growing 

 down about 3 mm. into agar. 



Clover juice Spores not as abundant as 



agar. on prune agar. Color green- 



ish-black. 



18 days. 



Dense growth covering en- 

 tire surface of the agar. 

 Mycelium growing out on 

 walls of tube. 



Growth entirely black ; 

 medium in amount as com- 

 pared with oat meal agar. 



Same as prune agar. 



Same ms prune agar. 



Hard potato 

 agar. 



Plain nutrient 

 agar. 



Nutrient agar 

 plus 5% 

 dextrose. 



Nutrient 



glucose agar. 



Coons' 



Synthetic agar. 



Litmus lactose 

 agar. 



Color deep black, abun- 

 dance of spores; submerged 

 mycelium. 



Color dark gray; spores 

 just beginning to form. 



Heavy black growth ; 

 spores abundant; second only 

 to oat agar. 



Same as dextrose agar. 



Ditto. 



Fair amount of growtli. 

 Spores present. Litmus be- 

 ginning to turn blue. 



Growth abundant. 



Growth lightest of all. 



No increase in amount of 

 growth. ■ May be due to dry- 

 ing o'f agar. 



Growth has spread some- 

 what otherwise same as dex- 

 trose agar. 



Ditto. 



The l)lue color has diffused 

 through the agar a consider- 

 able distance from region of 

 growth. 



