Us 



Agar alone. 



Soil and agar (Purdue soil). 



Sod extract (unheated) and agar. 



Soil extract (autoclaved) and agar. 



(15 gms. agar in all media.) 

 Colonies developing well on each media were transferred to slants of other 

 media. Tables give results of growth on these agar slants at end of 5, 11, 

 and 15 days. Incubation at 22 : C. 



From .'i Colonies on L and B agar to 





5 Days. 



11 Days. 



15 Days. 



Shown in 

 Plate 



Xa. asp. agar 



Agar alone 



2gr. 



2 — 



r 



2 gr. 



2 — 

 3gr. 



1 — 



3 gr. 



1 — 



3 gr. 

 1 — 

 3 gr. 

 1 — 

 3 gr. 

 1 — 



I 



Soil ext. Cunheatedi 









From Jf Colonics on Xa. asp. agar to 



L and B agar. 

 Agar alone. . . 



Soil ext. I'unheated . 



5 Days. 



11 Days. 15 Days. 



4g. 

 3 g. 

 1 — 



3 o 

 •' &■ 



1 — 



4 g. 

 3g- 

 1 — 

 4g. 



■4 g. 

 3 g. 



1 — 

 4g. 



Plate. 



Xa. asp. agar 



9oH ext. unheated . 



From 3 Colonies on Plain Agar to 





5 Days. 



11 Days. 



15 Days. 



L and B agar 



I- 



2 ". 



1 — 



2 g. 





1 — 



2 g. 



1 — 



2 g. 

 1 — 



