Ward . — Thames Bacteria , III. 
2I 7 
into the nearly clear liquid on shaking, and go to swell the 
dense yellowish-white deposit. In a month all is liquid, with 
a white ring and fallen veils. 
Agar at 2 2° C. Shows a spreading, white, granulated layer 
in twenty-four hours, and in three days this is very white, and 
extends as a veil over the clear drainage. In six days the 
marked whiteness and granular appearance persist (resembling 
the growth on potato), and new veils, wrinkled, replace those 
deposited in the clear liquid. 
At 34-35 0 the growth is also rapid, as yellowish-white 
spots confluent in twenty-four hours, and a veil and deposit 
already occur in the drainage. In two days it is an abundant 
white shining layer, with outlying dot-colonies. It consists 
almost entirely of paired rodlets i r 2 x 0.5 or 0.6 fi when 
stained, thicker before staining. It is more tawny than 
form No. 16. After two or three months the agar-growths 
are deep ochre-yellow. 
Potato at 22 0 C. In forty-eight hours a dense chalky- white, 
granulated, spreading growth appears, becoming mamillated, 
and of a peculiar milk-white appearance later. No further 
extension after four or five days, but in three weeks the 
colour is dull, and a slight metallic iridescence is observable. 
Broth . At 35 0 becomes rapidly turbid in twenty-four 
hours, and densely so in two to three days, when a white 
ring and deposit form. In a week an abundant white deposit 
has fallen and the liquid is still extremely turbid, but there 
are no distinct veils. 
At 25 0 , in broth infected from agar-culture, the course of 
events is much the same, but definite veils form. In twenty- 
four hours a slight white greasy-looking ring and veil occurs, 
and from the third day onwards the thin veils fall succes- 
sively. The dense turbidity and copious deposits are as 
before, the latter being very white, and even in a fortnight 
the turbidity is dense. 
Milk, infected from an agar-culture, gave definite separa- 
tion of the casein in forty-eight hours at 25 0 C., and by the 
sixth day much of the precipitated coagulum was dissolved, 
