71 



The media was cleared in the usual way, and after adjusting the reaction to 

 i.S p.c. acidity (phenalphthalein) sterilisation was acoom'plished by intermittent 



heating for three successive days. 



13. — Turuip plaut r.i days after inocula- 

 tion with turnip organism in crown. 



14. —Saint uirnip as Hig. IS cut in half. 



A medium was prepared fruni heallliy lurnips by methods similar to those 

 adopted with the potato medium: the results, however, were not such as to make 

 the using of turnips of an_\- advantage. 



I.'j. — Tui uip ?eccls sown in contaniiuatcrU and uncoutamiuatcd 

 soil. Pots II & IV contaiuinated. 



In testing for the percentage of gas present, a gasometer chart was used an.'l 

 the amount of gas expressed in per cent, of the total volume of the closed arm 

 of the fermentation tube. 



