vi Meteorological Observations. 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General's Office, Caleutta, 
in the month of January, 1865. 
Monruty ReEsvyts. 
Inches 
Mean height of the Barometer for the month, .. ee «. 30.066 
Max. height of the Barometer occurred at 10 A. M. on the 5th, s« 30.238 
Min. height of the Barometer occurred at 5 P. M. on the 27th, ee 29.844 
Extreme range of the Barometer during the month, ee ee = 0,94 
Mean of the Daily Max. Pressures,.. oe oe ee 30.143 
Ditto ditto Min. ditto, .. ac aA «» 30.008 
Mean daily range of the Barometer during the month, .. ee «=: 04185 
o 
Mean Dry Bulb Thermometer for the month, .. . ee 69.5 
Max. Temperature occurred at 2 & 3 P.M. on the 26th, .. o 83.2 
Min. Temperature occurred at 7 a. m. on the 11th, ae on 57.0 
Extreme range of the Temperature during the month, .. ee 26.2 
Mean of the daily Max. Temperature, se ee eo 73.9 
Ditto ditto Min. Giftio;, %. a ac a4 61.7 
Mean daily range of the Temperature during the month, .. ee 17.2 
Mean Wet Bulb Thermometer for the month, .. 55 ae 62.7 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, .. 6.8 
Computed Mean Dew-point forthe month, .. ee ee 57.3 
Mean Dry Bulb Thermometer above computed Mean Dew-point, nc 12.2 
Inches 
Mean Elastic force of Vapour for the month, .. oe ee 0.478 

Troy grains 
Mean Weight of Vapour for the month, o. ee a 5.26 
Additional Weight of Vapour required for complete saturation, ae 2.62 
Mean degree of humidity for the month, complete saturation being unity, 0.67 
Inches 
Rained 2 days, Max. fall of rain during 24 hours, ee ee 0.32 
Total amount of rain during the month, oo oe o. 0.48 
Prevailing direction of the Wind, .. ee ee N. & N. W: 



