Meteorological Observations. 



Abstract of tlie Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the month of July, 18G0. 



Monthly Kesttlts. 



Mean height of the Barometer for the month, 



Max. height of the Barometer occurred at 8 A. M. on the 18th, 



Min. height of the Barometer occurred at 4 P. M. on the 11th, 



Extreme range of the Barometer during the month, 



Mean of the Daily Max. Pressures, 



Ditto ditto Min. ditto, .. 

 Mean daily range of the Barometer during the month, 



Mean Dry Bulb Thermometer for the month, 

 Max. Temperature occurred at 2 & 3 p. M. on the 11th, 

 Min. Temperature occurred at 4 A. M. on the 23rd, 

 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, 



Indies 

 29.532 

 29.644 

 29.373 



0.271 

 29.579 

 29.475 



0.104 



o 

 83.9 

 96.8 



77.0 

 19.8 

 88.8 

 80.3 



8.5 

 80.7 



3.2 

 79.1 



Inches 

 0.973 



Troy grains 

 10.42 



Mean Weight of Vapour for the month, 



Additional Weight of Vapour required for complete saturation, .. 1.71 



Mean degree of humidity for the month, complete saturation being unity, 0.86 



Rained 23 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

 Prevailing direction of the Wind, .. 



Inches 



2.84 



17.92 



S. & S. E. 



