Ixxxvi Meteorological Observations. 



Abstract, of the Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the mouth oj October 1876, 



Monthly Hesults. 



Indies. 



Mean lieiglit of tlie Barometer for tlie month ... ... ... 29.883 



Max. lieiglit of tlie Barometer occurred at 9 a. m. on the 17tli.,. ... 30.062 



Min. height of the Barometer occurred at 9 p. m. on the 31st ... 29.558 



JSxtveme ranqe of tlie Barometer during the mouth ... ... O.SOJi 



Mean of tlie daily Max. Pressures ... ... ... ...29.948 



Ditto ditto Min. ditto ... ... ... ... 29.822 



Mean daily range of the Barometer during the mouth ... ... 0.126 



o 



Mean Dry Bulh Thermometer for the month ... ... ... 79.7 



Max. Temperature occurred at Noon on the 5th ... ... ... 89.8 



Min. Temperature occurred at 6 a. m. 8 & 9 p. m. on the 25th & 31st ... 70.5 



Extreme range o^ the Temperature during the mouth ... ... 19.3 



Mean of the daily Max. Temperature ... ... ... ... 85.0 



Ditto ditto Min. ditto, ... ... ... ... 75.4 



Mean daily range oi the Temperature during the month ... ... 9.6 



Mean Wet Bulh Thermometer for the month ... ... ... 75.4 



Mean Dry Bulh Thermometer ahove Mean Wet Bulb Thermometer 4.3 



Computed Mean Dew-point for the month ... ... ... 72.4 



Mean Dry Bulh Thermometer above computed mean Dew-point ... 7.3 



Inches. 

 Mean Elastic force of Vapour for the month ... ... ... 0.785 



Grain. 

 Mean Weight of Vapour for the month ... ... ... 8.48 



Additional Weight of Vapour required for complete saturation ... 2.24 

 Mean degree of humidity for the month, complete satux-ation being unity 0.79 



o 

 Mean Max. Solar radiation Thermometer for the month Out of order 



Inches. 

 Eained 16 days, — Max. fall of rain during 24 liours ... ... 3.59 



Total amount of rain during the month ... ... ... 5.80 



Total amount of rain indicated by the Gauge* attached to the anemo- 

 meter during the month ... ... ... ... ... 5.09 



Prevailing direction of the Wind ... ... S S W, S W & N N W 



* Height 70 feet 10 inches above ground. 



