Meteorological Observations. 



xlv: 



Abstract of tlie Results of the Hourly Meteorological Observations 



taken at the Surveyor General 1 s Office, Calcutta, 



in the month of October, 1860. 



Monthly Eestjlts. 



Mean height of the Barometer for the month, 



Max. height of the Barometer, occurred at 10 A. M. on the 13th, 



Min. height of the Barometer, occurred at 3 p. M. on the 2nd, 



"Extreme range of the Barometer during the month, 



Mean of the Daily Mas. Pressures, 



Ditto ditto Min. ditto, 

 Mean daily range of the Barometer during the month, . . 



Inches. 

 29.810 

 29.959 

 29.570 



0.389 

 29.876 

 29.754 



0.122 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature occurred at 2 P. M. on the 6th, 

 Min. Temperature occurred at 5 A. M. on the 27th, 

 Extreme range of the Temperature during the month, 

 Mean of the daily Max. Temperature, 



Ditto ditto Min. ditto, 

 Mean daily range of the Temperature during the month, 



Mean Wet Bulb Thermometer for the month, . . . . 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, . . 

 Computed Mean Dew Point for the month, 

 Mean Dry Bulb Thermometer above computed Mean Dew-point, .. 



Mean Elastic force of vapour for the month, . . . . 



o 



81.9 

 91.2 

 72.6 

 18.6 

 87.6 

 77.5 

 10.1 



o 



76.9 

 5.0 



74.4 



7.5 



Inches 



0.838 



Troy grains 

 Mean weight of Vapour for the month, .. .. .. 9.00 



Additional weight of Vapour required for complete saturation, .. 2.44 



Mean degree of humidity for the month, complete saturation being unity, 0.79 



Rained 6 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

 Prevailing direction of the Wind, . . 



Inches 

 1.26 



1.6S 



S. &N. 



