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12
ture has commonly ranged from 3 to 7 degrees
above the average for the season: in those months,
however, it was generally below the average; in
fact, in July and November, the temperature was
about 3 degrees under the average. The highest
temperature of the year has been 76 2 degrees.
It was reached on the 27th of July; and the lowest
temperature (25.2 degrees) was on the 30th of
December. The humidity of the air has ranged
from 75 to 93 per cent, of saturation, and the proportion
of rain has amounted to 26.5 inched. This
is about 4½ inches above the usual quantity; and
the number of wet days have been considerable
(164). The highest temperature of the river, has
been 67T degrees; and from the circumstance that
a large proportion of fresh water has been supplied
to it by the excessive rain-fall, the condition of the
water has been good. Excepting in the months of
October and November of I860, and of August
and September of the present year, the proportions
of saline and organic matter dissolved in the
water has averaged only 29.2 grains per imperial
gallon, of which 3.4 grains were organic. In the
autumn months, as usual, the quantity of dissolved
matter was excessive. In September it
amounted to 149.6 grains per gallon, of which 14
were organic. For several days, the water had
a disagreeable odour, but the temperature being
low, the putrefactive change was soon arrested