Meteorological Observations. XXXIX 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General's Office, Calcutta, 
in the month of December, 1863. 
Monruty Resurts. 
Inches 
Mean height of the Barometer for the month, .. ae -. 930.032 
Max. height of the Barometer occurred at 10 a. mM. on the 19th, ee 90.153 
Min. height of the Barometer occurred at 4: P. M. on the 7th, e- 29.914 
Hatreme range of the Barometer during the month, So og O88) 
Mean of the Daily Max. Pressures, .. oe se -- 980.106 
Ditto ditto Min. ditto, .. OC be co) AOE 
Mean daily range of the Barometer during the month, .. e- 0,184 
() 
Mean Dry Bulb Thermometer for the month, .. ee ee 66.7 
Max. Temperature occurred at 2 Pp. m. on the 11th, ste O¢ 79.7 
Min. Temperature occurred at 6 & 7 a. M. on the 16th, .. o« 56.4 
Hatreme range of the Temperature during the mouth, bo ae 23.3 
Mean of the daily Max. Temperature, te ve a 76.6 
Ditto ditto Min. ditto, .. te 56 we 58.7 
Mean daily range of the Temperature during the month, .. ee 17.9 
Inches 
Mean Wet Bulb Thermometer for the month, .. ate 50 60.7 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, .. 6.0 
Computed Mean Dew-point forthe month, .. ee eo 55.9 
Mean Dry Bulb Thermometer above computed Mean Dew-point, oe 10.8 
Mean Elastic force of Vapour forthe month, .. ee ee =: 46 
——————— 
Troy grains 
Mean Weight of Vapour for the month, ee ee ee 5.05 
Additional Weight of Vapour required for complete saturation, se 2.18 
Mean degree of humidity for the month, complete saturation being unity, 0.70 
Inches 
Rained No. days, Max. fall of rain during 24 hours, ee ee Nil. 
Total amount of rain during the month, oe se oe Nil. 
Prevailing direction of the Wind, .. 5c 5c . N.&NW 
