478 



Mr. E. C. Grey. Decomposition of 



although quite effective, is somewhat troublesome to use, owing to shrinkage 

 on cooling. A rubber stopper plunged beneath mercury is, on the whole, a 

 simpler means of sealing off the flask. 



Total volatile acid, 

 c.e. normal potasli. 



Carbonic acid, 

 c.c. normal baryta. 



Lactic acid, 

 c.c. normal (Ryffel's method). 



48 -5 



1 -44 



1-68 



38 -2 



1-0 



1 -1 



34 -3 



0-3 



8 



51 -5 



1 -o 



1 -o 



41 -1 



1 3 



6 



Results of Analysis of the Decomposition Products of Glucose and Mannitol 

 formed by the Action of the Normal and Selected Strains of B. coli communis. 



Table III. 



Typical B. coli communis (rapidly motile) No. CI. 



Product. 



Normal. 



Selected. 





per cent. 



per cent. 



Mean. 









On G-hicose. 





C0 2 



14 -90 



14 -74 



14 -82 I 



2-25") 



Ho 



0-55 



0-52 



-54 1 18 -66 



-08 \ 17 -23 





3-24 



3-36 



3 -30 J 



14 -90 J 





14 -10 



12 -91 



13 -00 



5-69 



Lactic 



39-42 



36 -91 



38 -07 



59 -60 





3 -60 



4-60 



4-20 



5 -50 



Alcohol 



12 -83 



11 -02 



11 -93 



4-90 









85 -86 



92 -92 



Ratio C0 2 :H 2 ... 



1-23 



1 -29 



1 26 



1-28 







On Mannitol. 





C0 2 



26 -66 



28 -Q0 



27-331 



13 -33 "I 



H 2 



1 04 



1 -06 



1 -05 \ 35 -77 



-64 \ 31 -45 





7-21 



7-56 



7-39 J 



17 -48 J 





7-33 



6 75 



7-04 



7-20 





22 -82 



26 -27 



24-55 



19 -95 





8-80 



5 -00 



6-90 



8-61 





27 -06 



26 -85 



26 -95 



27 -46 









101 21 



94 -67 



Ratio C0 2 : H 2 ... 



1-17 



1 -20 



1 -19 



0-95 



