104 THE EVOLUTION OF LIFE 
case, and accordingly another infusion was prepared 
in which no rind was employed. As _ before, the 
fresh acid infusion of turnip was divided into two 
parts, one of which was neutralised by liquor potasse. 
Of four retorts, three were charged with unneut- 
ralised liquid, the fourth with neutral. Of the three, 
two were treated with cheese; to the third no 
addition was made. They were prepared in every 
respect as before. In each case the drawing-in of 
the glass in the blow-pipe flame was again noticed 
before the neck of the retort was broken. 
(a) Unneutralised infusion with cheese. — This 
infusion showed opalescence, even after twenty-four 
hours. On the 23rd it had become decidedly turbid, 
and was opened. The liquid was feetid, and its 
reaction acid. It swarmed with Bacteria. 
(6) Zhe same.—The retort was opened on the 
31st, its contents having shown a slight turbidity for 
several days previously. The liquid was slightly 
foetid, and it contained characteristic Bacteria, which, 
however, were few in number. 
(c) Neutral enfuseon wethout cheese.—The retort 
was opened on December 31, the fluid having been 
slightly turbid for several days. The liquid was 
acid, and slightly feetid, but still retained the odour 
of turnip. A drop contained a few Bacteria, about 
0'003 mm. in length, which exhibited oscillatory 
movements. 
(dq) Unneutralised infusion wethout cheese.—The 
liquid contained a white mass which lies at the 
bottom, and was so tenacious that it could be drawn 
out into strings with needles. This consisted entirely 

