560 Proceedings of the Royal Society of Edinburgh. [Sess. 
selected, and injected subcutaneously, each with a different-sized dose of in- 
fective material. Thus one loopful of the growth from a forty-eight-hours 
agar culture was emulsified in 10 c.c. of sterile saline solution, and the four 
goats were inoculated subcutaneously at the root of the left ear with 1 c.c., 
0T c.c., 001 c.c., and O’OOl c.c. respectively of the emulsion. Portions of 
the remainder of the emulsion, after suitable dilution, were plated out 
and incubated. Enumeration of the resulting colonies showed that the 
emulsion contained 10 million cocci per cubic centimetre. 
