120 



ROYAL SOCIETY OF CANADA 



again tested after 4 hours or more and again on the follo'oàng day, 

 with the results shown in the table. 



Soluble invertase. 



Tube. 



1 



2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 



Culture Medium. 



Neut. bouillon 



Bouillon acid 4° 



Peptone in 1% tap water 



Peptone 1% 



Peptone 1% 



Peptone 2 %, NaCl 2% . . . 



Peptone 1% 



Peptone 1% 



Peptone 1% 



Peptone 1% 



Fehling's solution reduced 

 after 



+ 5 h. 7 rain. 



+ 4 h. 17 inin. 



— boiled control. 

 + 5 h. 17 min. 

 + 4 h. 27 min. 



Cultures 1, 4, 5, 7 and 8 were pigmented and slimy at the time of 

 the test. All were turbid, more or less viscid, and with a ropy sediment. 

 The contents of tube 8 were boiled just before placing the tubes in the 

 water bath. 



Inversion of Sucrose in Alkaline Agars after 6 Days' Growth at 20° G 



