372 STATE BOARD OF AGRICULTURE. 



SERIES II. 



'p 



The Nutrient Solution used in Series II. contained its nitrogen in the 



e>' 



form of Peptone and had the following- composition: 



Peptone 5.0 grams 



Sodium chloride 1.0 "^ 



Potassium sulphate 1.0 '' 



Ferrous sulphate 0.001 " 



Distilled water 1000 c. c. 



Germ No. 8 gave the largest amount of soluble phosphoric acid in this 

 series/ 0.82%, while B. coli communis produced the least, 0.12%, While 

 eight of the cultures shown in this series indicate a progressive solu- 

 tion, there are two others which seem to point to a reversion of the 

 soluble salt after sixty days to the insoluble form at the end of ninety 

 days. Thruout the series there is a considerable fluctuation in the re- 

 sults due either to an apparent reversion or to error in chemical de- 

 terminations, the quantities in many of the analyses being so exceedingly 

 small as to be overbalanced by the personal equation. Detailed results 

 are given in Table No. 5. 



