Meteorological Observations. 
lxxxvii 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General' s Office, Calcutta, 
in the month of March, 1861. 
Monthly Kesults. 
Inches 
Mean height, of tlie Barometer for the month, .. .. 29 853 
Max. height of the Barometer, occurred at 10 A. M. on the 12th, . . 30.090 
Min. height of the Barometer, occurred at 5 p. M. on the 23rd, .. 29.662 
; 'Extreme range of the Barometer during the month, . . . . 0.428 
Mean of the daily Max. Pressures, .. .. .. 29.933 
Ditto ditto Min. ditto, ... .. .. 29.786 
Mean daily range of the Barometer during the month, . . . . 0.147 
o 
Mean Dry Bulb Thermometer for the month, . . . . 80 8 
Max. Temperature occurred at 4 p. M. on the 30th, .. .. 97.8 
Min. Temperature occurred at 6 A. M. on the 8th, .. 67.8 
Extreme range of the Temperature during the month, .. .. 30 0 
Mean of the daily Max. Temperature, .. .. .. 91.2 
Ditto ditto Min. ditto, .. .. .. 72.8 
Mean daily range of the Temperature during the month, . . 18.4 
o 
Mean Wet Bulb Thermometer for the month, .. .. 72.7 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, . . 8.1 
Computed Mean Dew-point for the month, .. .. 68.6 
Mean Dry Bulb Thermometer above computed Mean Dew-point, . . 12.2 
Inches 
Mean Elastic force of Vapour for the month,.. .. .. 0.695 
Troy grains. 
Mean Weight of Vapour for the month, .. .. .. 7.49 
Additional Weight of Vapour required for complete saturation, . . 3.58 
Mean degree of humidity for the month, complete saturation being unity, 0.68 
Inches 
0.60 
0.88 
S. & S. W. 
Rained 3 days, Max. fall of rain during 24 hours, 
Total amount of rain during the month, 
Prevailing direction of the Wind, 
