Meteorology.
4 6
MEDICAL AND SANITARY REPORT OF THE NATIVE ARMY OF MADRAS.
Bangalore.
—
1871.
1872.
1873.
1874.
1875.
Mean barometric pressure
26.927
2 6 . 9 1 1
26.929
2 6 . 9 2 2 26.922
Do. temperature of air
72.9
73.8
72.5
71.9
72.7
Do. do. wet bulb
66 . 2
66.2
64.2
64.5
64.6
Observed extremes
Maximum
Minimum
84 . 2
64 . 7
82.8
64.3
84.1
64.2
83.3
63.4
84.7
63.8
Do. humidity (saturation 100)
72
72.6
70
70
66
Do. maximum solar heat in vacuo
132
128.8
134.1
132 . 5
143.1
Do. minimum on grass
61.9
62.1
61.3
61.6
56.6
Do. depth of rain in inches
29.058
39.911
29.111
56.580
22.20
Number of days on which rain fell
107
92
80
126
76
Mean Meteorological Results for each quarter of the year 1875.
Quarters.
Barometer
reduced to
32°.
Thermometer.
Humi- dity.
Sun' s Rays i n Vacuo. Mini-
mum on
Grass.
Wind.
Rain.
No. of
Rainy
Days.
Daily
Means.
Observed
Extremes.
Velocity.
Dry. Wet. Maxi- mum Mini- mum.
First
26 . 974
71 . 1 60.7 84.2 60.1
57
..
..
87
IN.
0.860
1
Second
26 . 872
77 . 2 67.6 90.2 68.2
63
145.9
. .
144
9.300
27
Third
26 . 872
72.2 66.8 83.3 65.0
76
141.6
..
221
8.660
32
Fourth
26 . 971
70.1 63.2 81.1 61.9
69
144.3
56.6
89
3.300
16
Means and Sums
26.922
72.7 64.6 84.7 63.8
66
143.1
56.6
135
22.20
76
Meteorological Means (unreduced at Bellary for the year 1875.
1875.
M e a n f o r y e a r .
H i g h e s t i n y e a r .
L o w e s t i n y e a r .
R a n g e .
H i g h e s t i n y e a r .
L o w e s t i n y e a r .
R a n g e .
M e a n o f a l l H i g h e s t
M e a n o f L o w e s t
Range.
A p p r o x i m a t e M e a n i n y e a r .
Me a n o f D r y B u l b .
M e a n o f W e t B u l b .
N o . o f D a y s i t f e l l .
A m o u n t c o l l e c t e d .
G e n e r a l D i r e c t i o n .
E s t i m a t e d S t r e n g t h .
Mean
28.476 28.544 28.401 .143 99.4 63.6 35.7
9 4 . 6
69.9 23.5 60.0 83.9 68.4 57 18.626 S. by W. 129
These tables exhibit the general meteorological results as rendered at the Observatories of
Bangalore and Bellary for the year 1875 and four antecedent years. The observations taken at
the Bellary Observatory are submitted unreduced, those at the Bangalore Observatory, however,
are reduced from tables compiled by the Government Astronomer. The Bellary tables are
ultimately reduced by Mr. Fogson, but the results are published too late for incorporation with
this report. As regards Bangalore, the principal meteorological features of 1875 consist in a
diminution in the humidity of the air, in a high mean maximum of solar heat in vacuo, in a
diminished rainfall, and in a diminution in the number of days on which the rain fell. The year
was, in ordinary language, a hot, dry, and during the north-east monsoon a comparatively rainless
one. The deficiency in the rainfall was seriouly felt at Bangalore and over Mysore generally, and
would have been much more severely felt had it not been for the excessive fall of 1874 (56 inches
580 cents) which filled the tanks, and so mitigated the grave inconveniences of the water-supply
of 1875. The fall of 1875 came short of the average (34 inches 334 cents) by 12 inches 134 cents.
Drought of this kind, so severe and general, was favourable to the spread of epidemic and febrile
diseases by depressing on the one hand the health state of the community, and on the other by
raising the prices of the food-supplies.
The results tabulated at the Bellary Observatory show, as compared with those of 1874, a
diminished rainfall spread over a less number of clays than in 1874. In 1874 there fell during 84
days 26 inches 169 cents of rain; in 1875 there fell over 57 days 18 inches 626 cents of rain.
The rainfall at Bellary is scanty; during the 16 years previous to 1874 the fall varied from a
minimum of 13 inches 2 cents to a maximum of 21 inches 6 cents, giving the average fall as 17
inches 4 cents, or less than the fall of 1875 by 1 inch 226 cents.
SANITARY.
From year to year the sanitary condition of lines and cantonments is recorded in the Annual
Inspection Reports, and to these I would refer for all matters of detail. Suffice it here to say that