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‘February these were, for the most part, discharging. In 
March, April or May they usually dry up. 
Of course, it is scarcely necessary to state that when rain 
is not actually falling in India, the sky is usually cloudless 
and the days are clear. 
Let us now discuss the results of the bacteriological 
analysis of the water samples taken during these three quarters. 
In the quarter ending 30th September 1908 it has already 
been stated that the lakes were extremely low. Therefore 
it may be assumed that the organisms present really represent 
those particular varieties which have succeeded in surviving 
during the hot and sunny months of the Indian spring and 
summer, a period of from 6 to 9 months. 
A reference to Table IX (a) shows that fecal organisms 
were relatively extremely common in the water of these lakes 
(as the figures in the narrow column demonstrate) : there is 
only one sample in the whole number that gives no fecal 
bacilli in 5 c.c., viz., Tiger Hill in Ootacamund ; in all the 
others fecal bacilli are present in I c.c., ‘I C.c. or ‘OI C.C. 
In spite of the great power of the sun during the summer 
months, these organisms that are present have not been 
affected to any great extent, otherwise the water would be 
purer. Consequently it is certain that the organisms found 
at this time are indeed resistant ones. Both Tables IX (a) 
and IX (b) demonstrate the fact that 75 per cent. of the organ- 
isms present at this period of the year are cloace and the 
Grunthal-vesiculosus group. It will be observed, by looking at 
Table IX (a), that quite a fair proportion of the remaining 
25 per cent. of organisms have been derived from the Oota- 
camund reservoirs where, as we have seen, rain had fallen. 
It may be objected that in the method of analysis which we 
adopted, the actual percentage prevalence of any particular 
organism is not a satisfactory indication of its real fre- 
quency in water-supplies. This objection does not apply 
when the average number of fecal bacilli is between 1 and 
10 per c.c. ; but it is a reasonable criticism when fecal bacilli 
are scarce, such as I in 100, or lin 50c.c. But even admitting 
this objection, it will be observed, that out of 12 different 
water-supplies examined, either cloace, or Grunthal, or both, 
