Meteorological Observations. xxxi 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the month of August, 18G0. 



Monthly Eesults. 



Inches 



Mean height of the Barometer for the month, .. .. 29.605 



Max. height of the Barometer, occurred at 10 A. M. on the 27th, . . 29.826 



Min. height of the Barometer, occurred at 3 P. ar. on the 3rd, .. 29.363 



"Extreme range of the Barometer during the month, .. .. 0.463 



Mean of the Daily Max. Pressures, . . . . . . 29.662 



Ditto ditto Min. ditto, .. .. .. 29.544 



Mean daily range of the Barometer during the month, . . . , 0.118 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature occurred at 2 p. M. on the 11th, 

 Min. Temperature occurred at 4 a. m. on the 21st, .. 



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, 



83.6 

 95.6 



78.7 

 16.9 

 88.0 

 80.4 

 7.6 



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, . . 



80.5 

 3.1 



78.9 



4.7 



Inches 



0.967 



Troy grains 

 Mean weight of Vapour for the month, .. .. .. 10.37 



Additional weight of "Vapour required for complete saturation, .. 1,66 



Mean degree of humidity for the month, complete saturation being unity, 0.S6 



Rained 25 days, Max. fall of rain during 21 hours, 

 Total amount of rain during the month, 

 Prevailing direction of the Wind, 



Inches 



2.13 



14.65 



S. &E. 



