Meteorological Observations. 
vii 
Abstract of -the Results of the Hourly Meteorological Observations 
taken at the Surveyor General’s Office , Calcutta , 
in the month of May, 1860. 
Monthly Kjksults. 
Mean height of tlie Barometer for the month, 
Max. height of the Barometer, occurred at 9 A. M. on the 5th, 
Min. height of the Barometer, occurred at 5 p. M. on the 31bt, 
"Extreme Range of the Barometer during the month, 
Mean of the Daily Max. Pressures, 
Ditto ditto Min. ditto, 
Mean daily range of the Barometer during the month, 
Inches 
29.G13 
29.845 
29.417 
0.428 
29.6S2 
29.537 
0.145 
o 
Mean Dry Bulb Thermometer for the month, . . . . 88.7 
Max. Temperature occurred at 3 P. M. on the 21st, .. .. 105.8 
Min. Temperature occurred at 1 A. M. on the 4th, .. ... 72.8 
Extreme range of the Temperature (luring the month, .. .. 33.0 
Mean of the daily Max. Temperature, .. .. .. 98.7 
Ditto ditto Min. ditto, .. .. .. 81.0 
Mean daily range of the Temperature during the month, .. 17.7 
0 
Mean Met Bulb Thermometer for the month, . . . , 81.4 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, . . 7.3 
Computed Mean Dow Point for the month, . . .. 77.7 
Mean Dry Bulb Thermometer above computed Mean Dew- Point, .. 11,0 
Inches 
Mean Elastic force of vapour for the month, . . .. .. 0.93p 
Troy grains 
Mean weight of Vapour for the month, .. .. .. 9.88 
Additional weight of Vapour required for complete saturation, .. 4.08 
Mean degree of humidity for the month, complete saturation being unity, 0.71 
Inches 
Rained 8 days, Max. fall of rain during 21 hours, .. .. 0.94 
Total amount of rain during the month, .. .. .. 2.21 
Prevailing direction of the Wind, .. .. S. & S. E. 
