
7 
FINAL DECISIVE EXPERIMENTS 263 
weeks. No Streptococci, Torule, or incipient 
Moulds were seen in the deposit from this tube, 
though a number of long and much twisted Bacilli 
were found. 
Both these tubes contained the A solution, while 
the two to which I am now about to refer were 
charged with the AA solution and, instead of being 
exposed to light, were kept in the dark incubator 
for five weeks. In and on the flakes of silica 
taken from one of them multitudes of minute 
Bacteria, mixed with a sparing number of long 
Bacilli, were found, such as are shown in Fig. 
18, A; while here and there, on the edges of some 
of the flakes, aggregates of Micrococci were found, 
like those that are to be seen in Fig. 18, B. A few 
incipient Moulds were also found, though these were 
more numerous in a companion tube, similarly 
charged and exposed, to which I am about to refer. 
Incipient Moulds have already been shown in 
Figs. 14 and 15, taken from solutions that had 
been heated to 100° C only, and subsequently 
exposed to light; and now we shall meet with very 
similar bodies, taken from tubes heated to higher 
temperatures, and exposed either to heat or to 
light. | 
In Plate VI., Fig. 19, A, a very early stage of 
three of these Moulds is to be seen, while in B a 
part of a much more developed specimen is shown. 
The tapering nature of the extremity on the left 
may be recognised, while that on the right (not 
shown in the photograph) was very similar. In 
Fig. 19, C, a more highly magnified specimen is to 
