308 Ward. — Some Thames Bacteria. 
Normal potato at 35 0 shows very slight growth in forty- 
eight hours. Little progress in four days to a week : merely 
a few extremely minute red spots in a watery film. 
Carrot at 25 0 gives a thin and very poor pinkish-white 
growth in fourteen days. 
Artichoke. No growth in fourteen days at 25 0 . 
Turnip. No growth in fourteen days at 25 0 . 
Broth. No growth at 35 0 in a week, nor after a month’s 
subsequent keeping at ordinary temperatures. At 25 0 a faint 
pinkish deposit in three days, but no turbidity. In a fort- 
night the deposit is increased — granular and flesh-pink : no 
turbidity or other change. The pink slowly deepens in hue. 
Milk. At 25 0 showed no change in fifteen days beyond 
traces of pink in a small white deposit. This had not in- 
creased by the third week, when the liquor was faintly 
but distinctly alkaline in reaction : no other change, but in 
the course of two or three months there are traces of 
peptonization without coagulation. 
Glucose at 25 0 . Showed no growth in fourteen days. 
Not proved to be pathogenic for guinea-pigs according to 
Professor Kanthack. The results are doubtful. 
The following pink, non-liquefying micrococci and yeasts 
are on record. 
Micrococcus cerasinus siccus (List : ) is a very minute form, 
0*25 to 0-32 fj, in diameter, found in water, but growing best 
at high temperatures — e.g. 37 0 C. — and not doing well on 
gelatine. It is interesting to observe that this form is also 
noted as resembling a Torula in some cases, but it is in- 
capable, according to Adametz, of inducing fermentation. 
The description to hand is very meagre, but the size, 
temperature, and other characters seem different from those 
of the Thames organism. 
M. carneus (Zimmermann) 2 . This form, found in the 
Chemnitz water-supply, presents some striking resemblances 
to the Thames one. The cocci average about o-8 /x in 
1 Eisenberg, Bakteriologische Diagnostik, p. 34. 
2 Zimmermann, 1 . c., p. 78. 
