86 







B. BRADLEY. 





Galactose 



tested bj 



' 5 



observers . 



acid and gas 



Inulin 



n 



5 



a 



nil 



Levulose 



tt 



5 



a 



acid and gas 



Raffinose 



»i 



3 



a 



nil 





11 



MacOonkey 



acid and gas 



Dextrin 



n 



3 



observers 



acid and gas 





11 



May 



nil 



Arabinose 



ii 



3 



observers 



... acid and gas 



Salicia 



n 



3 



n 



nil 



Erythrit 



ii 



3 



a 



nil 



Sorbit 



1 1 



2 



n 



... acid and gas 



Amygdalin „ 



1 



?» 



nil 



Glycerin 



ii 



1 



»i 



... slight action 



Litmus milk, or litmus whey, was used by the majority 

 of the above observers and the results are in agreement. 

 Acidity is always produced followed quickly by alkalinity 

 in one group. In the other group the acidity is either 

 permanent or much more slowly replaced by alkali. The 

 indol reaction seems to have given rather variable results. 



Present Investigations. 

 The present investigation is firstly the outcome of an 

 inquiry into the bio-chemical properties as tested by the 

 various media detailed in tabular form of the Gaertner 

 type organisms stocked in the Bureau, which have either 

 come into our possession as " standard types " from various 

 European laboratories, or been collected from various 

 sources as part of the work of this department. Later in 

 this communication I give the results of the bio-chemical 

 findings in certain organisms isolated under my direction 

 from samples of normal human faeces, food stuffs, etc., 

 which approximately belong to the Gaertner type. Finally 

 I conclude with some findings in connection with certain 

 cultures of the anaerogene class which was found in our 

 stock labelled incorrectly. 



