290 
War'd.' — Some Thames Bacteria . 
On keeping at lower temperatures a tough paste-like dirty 
white patch slowly spread in a month. 
At 22° white granular discs appeared in twenty-four hours, 
and coalesced to a thin spreading yellowish white film in two 
to three days. Slight white deposit in drainage. In a week 
there was little progress : the individual colonies are thin 
fronds like those on gelatine plates, but remain small. They 
are often polygonal where their edges touch, and give a curious 
mosaic-like or scaly look to the growth (Fig. 6). Under the 
lens these resemble the scales of a Turbot. In other cases 
the film is continuous. 
Potato at 34 0 gave no results in a week, but at 22° a dull, 
white yellowish streak appeared in twenty-four hours, with 
the peculiar stearine-like look of the gelatine colonies. In 
forty-eight hours this was thicker, dry, yellowish grey, and 
in four days had crenate and somewhat mesenteric edges. 
The colour darkened with age — buff, and like dull wax. In 
a week this consisted of rodlets 2 x i breaking to cocci i \x 
in diameter. Old cultures at 34° showed a slight growth after 
one month at lower temperatures. After two to three months 
the growth turns umber-brown. 
Broth at 25 0 formed dense flecks above in twenty-four 
hours, which easily shook down. In forty-eight hours a dense 
greasy-looking flocculent veil above, falling at the slightest 
shake : abundant deposit. These flocculent veils are renewed, 
the intermediate liquid remaining clear. The very abundant 
flocculent deposit acquires a slightly buff-white tinge with age. 
Milk at 25° showed no change in a month, beyond a 
distinctly acid reaction. On keeping three months still no 
change observable. 
Glucose at 30° formed white flocks below in twenty-four 
hours, and this deposit increased in two to three days. But 
no bubbles or turbidity resulted. At 25 0 the flocks and 
deposit were slightly more abundant, and resembled the 
broth cultures. No turbidity. The deposit slightly yellowish, 
but not very abundant even in three weeks. 
Urine at 25-30° gave very slight traces of turbidity in 
