Soil Organisms concerned in Nitrogen Cycle. 517 



Table V. 



Flask. 



Contents of each flask 

 in each series. 



Nitrogen content after 

 10 days. 



Crude. 



Pure. 



Grain in nitrogen in 

 10 days. 



Crude. 



10 

 11 

 12 



13 

 14 

 15 



16 

 17 

 18 



19 



20 

 21 



22 

 23 

 24 



25 

 26 

 27 



28 

 29 

 30 



Control 



1} SJ 



100 c.c. mannite solution 



Control 



» • 



100 c.c. mannite solution 

 + water extract of 

 - 5 grm. bacterised peat 



Control 



100 c.c. mannite solution 

 + alcoholic extract of 

 1 grm. bacterised peat 



Control 



100 c.c. mannite solution 

 + phosphotungstic frac- 

 tion of 1 grm. bacterised 

 peat 



Control 



100 c.c. mannite solution 

 + silver fraction of 

 1 grm. bacterised peat 





 

 6 

 6 

 6 

 5 



10 

 10 



24 



mgrm 

 2 

 2 



0-2 



10 -5 



1} 



10 -3 

 10 -7 

 10 -8 



10 -8 



11 -0 

 10 -1 

 10 -5 



2-2 



0-2/ U 4 



mgrm 

 0-11 



o-i j- 



4-1 

 4-3 

 4-4 

 4-7 



0-1 



10 -3 

 10 -3 



26 -3 



10 -3 



25 

 26 

 26 



2 

 2 

 17 



10 



6 

 2 

 3 



t} 



2-1 



°' 2 l 0-2 

 0-2 J u 



10 -0 



10 -2 

 10 -3 

 10 "4 



mgrm. 



6-31 





4-0"] 





5- 9 



6- 



> 6-0 



4-2 

 4-3 



* 4-3 



5 -7 J 





4-6^ 





14 -3 



*1 



15-0 f 14 ' 5 

 14-6 | 

 14 -2 J 



13 -9~) 



•7 



14 -2 



•1 



14 -4 



•3 



13 -8, 



1} 03 





•1 



10 -2" 



•9 



9-9 



•5 



10 -3 



•2 



10 -4 



14 -1 



10 -2 



10 -6-] 



10 -8 

 9 9 

 10-3 



■10 -4 



effect of the auximones on all these varieties was tested by cultivating them 

 in a solution consisting of 100 c.c. distilled water, 1 grm. sucrose, 

 0-2 grm. K 2 HP0 4 , 0-02 grm. MgS0 4 , and 0-2 grm. CaC0 3 . Similar results 

 to those shown with Azotobacter were obtained with every variety of the 

 organism tested. The following mean fixations obtained with broad bean 



