Meteorological Observations. Ixxxvif 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General's Office, Calcutta, 
in the month of May, 1863. 
Monruty Resurs. 
Inches 
Mean height of the Barometer for the month, .. 56 -- 29.625 
Max. height of the Barometer occurred at 10 4. M. on the 7th, «- 29.798 
Min. height of the Barometer occurred at 4 P. mM. on the 30th, -- 29.373 
Extreme range of the Barometer during the month, sis e- 0.425 
Mean of the Daily Max. Pressures, . ae 56 -- 29.694; 
Ditto ditto Min. ditto, .. us ae -- 29.546 
Mean daily range of the Barometer during the month, .. -- 0.148 
: oO 
Mean Dry Bulb Thermometer for the month, .. fe oe 85.8 
Max. Temperature occurred at 4 P. M. on the 29th, 60 -- 104.0 
Min. Temperature occurred at 5 A.M. on the 7th, 56 e. 74.0 
Extreme range of the Temperature during the month, ae oe 30.0 
Mean of the daily Max. Temperature, oe ve oo 94.5 
Ditto ditto Min. ditto, .. ae as as 78.8 
Mean daily range of the Temperature during the month, .. ce 15.7 
Mean Wet Bulb Thermometer for the month, .. sie se 79.3 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, .. 6.5 
Computed Mean Dew-point for the month, as 56 74.7 
Mean Dry Bulb Thermometer above computed Mean Dew-point, aie 11.1 
Inches 
Mean Hlastic force of Vapour for the month, .. ae e- 0.846 
Troy grains 
Mean Weight of Vapour for the month, ae ste ac 9.03 
Additional Weight of Vapour required for complete saturation, ste 3.80 
Mean degree of humidity for the month, complete saturation being unity, 0.70 
Inches 
Rained 13 days, Max. fall of rain during 24 hours, Ais ie 1.55 
Total amount of rain during the month, a6 Da be 4.20 
Prevailing direction of the Wind, .. ee ae 8.58. H. 
