THE PRESENCE, TYPE, AND POSSIBLE SIGNIFICANCE OF LACTOSE-FEKMENTING BACILLI 323 



Experiment II. — Date, November 24, 1910. Local rainfall, nil. 



Sample taken from the Blue Nile two metres from the river bank. The river had 

 been steadily decreasing in volume for a period of two months. Temperature 24-5 C. 

 («) Total colonies on agar at 37" C. = 218 per 1 c.c. 

 {h) Faecal bacilli present in -1 c.c. 

 (c) Sporogenes milk test + in 20 c.c. 



Cirouji I, "2 Group II, 2 Group III. 5 



Experiment III. — ^Date, July 28, 1910. Local rainfall, nil. 



Sample taken from a shallow well situated in a native hoosh (yard) about a quarter 

 of a mile from the Blue Nile. 



The water was at a depth of 19 metres from the surface. Temperature 30 C. 

 (a) Total colony count in agar at 37" C. = 700 per c.c. 

 (h) Faecal bacilli present in -01 c.c. 

 (c) Sporogenes milk test + in 20 c.c. 



Group I, 3 Group II, nil Group III, 2 Group IV, 5 



** About all these there is m certaiu amuuut of duubt 



