

EXPERIMENTS WITH SALINE SOLUTIONS 253 
were found abundantly in and on flakes of silica, 
taken from a boiled A solution in a corked flask, 
that had been exposed to diffuse daylight, during 
bright and warm weather, for only two weeks. 
While in Fig. 5, B, there is shown, from an AA 
solution which had been exposed to light for two 
months, during colder weather, what I have very 
frequently seen—that is, a Torule corpuscle sur- 
rounded by Bacteria. At other times, groups of 
such corpuscles, with surrounding Bacteria, are to 
be seen, as in Fig. 5, C, which was found in another 
flake of silica from the same solution. 
In Fig. 6 a number of comma Bacilli or 
Vibriones are shown, such as were found on the 
surface of flakes of silica taken from an A solution 
which had been exposed to light for three weeks. 
In a BB solution that had been exposed to light 
for only fourteen days, during hot weather in the 
month of June, a number of rather large colourless 
Torula corpuscles, some of which are shown in Fig. 
7, A, were found, either singly or in groups, rather 
sparingly distributed through the flakes of silica. 
Associated with the Torule there were some small 
groups of Micrococci. 
Other brownish Torule corpuscles are shown in 
Fig. 7, B, which were taken from a B solution that 
had been exposed to light for two weeks during warm 
weather. They had a tendency to grow in single rows, 
or in groups of rows, as shown in the figure. 
Torule have generally been found distinctly more © 
frequently in flasks that have been exposed to light 
than in those which have been placed in a dark 
