Meteorological Observations. Xv 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General’s Office, Calcutta, 
in the month of February, 1865. 
Monrnuty Resvrrs. 


Inches 
Mean height of the Barometer for the month, .. «. eae 29: 972, 
Max. height of the Barometer occurred at 10 & 11 a. M. on the 15th & 28th, 30.157 
Min. height of the Barometer occurred at 6 Pp. M. on the 10th, «. 29.802 
Extreme range of the Barometer during the month, ee ee 0355 
Mean of the Daily Max. Pressures,.. nic es ee 30.062 
Ditto ditto Min, ditto, .. we ne «- 29.907 
Mean daily range of the Barometer during the month, .. e- 0,155 
o 
Mean Dry Bulb Thermometer for the month, .. ae ee 73.7 
Max. Temperature occurred at 3 P. M. on the 20th, ee ee 87.8 
Min. Temperature occurred at 7 a. M. on the 7th, Ae Bic 61.2 
Extreme range of the Temperature during the month, .. - 26.6 
Mean of the daily Max. Temperature, oe an Je 82.1 
Ditto ditto Min. ditto, .. se ee ee 66.5 
Mean daily range of the Temperature during the month, .. os 15.6 
Mean Wet Bulb Thermometer for the month, .. aw ae 66.5 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, .. 72 
Computed Mean Dew-point forthe month, .. Ae Se 61.5 
Mean Drf Bulb Thermometer above computed Mean Dew-point, ae 12.2 
Tuches 
Mean Blastic force of Vapour for the month, .. ne oe OLHO 
Troy grains 
Mean Weight of Vapour for the month, ae oc & 6.01 
Additional Weight of Vapour required for complete saturation, BF 2.95 
Mean degree of humidity for the month, complete saturation being unity, 0.67 
Inches 
Rained 10 days, Max. fall of rain during 24 hours, 46 ne 0.72 
Yotal amount of rain during the month, ae ie ee 1.86 
Prevailing direction of the Wind, .. oe oe N. W. & W. 
