Ixvii 



Meteorological Observations, 



Abstract of the Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the month of August 1874. 



Monthly Eesults. 



Inches. 



Mean lieiglit of the Barometer for the month ... ... ... 29.587 



Max. height of the Barometer occurred at 10 a. m. on the 29th ... 29.818 



Min. height of the Barometer occurred at 4 p. m. on the 2nd ... 29.347 



Extreme range of the Barometer during the month ... ... 0.471 



Mean of the daily Max. Pressures ... ... ... ...29.642 



Ditto ditto Min. ditto ... ... ... ... 29.521 



Meaw (fai/^ raw^d of the Barometer during the month ... ... 0.121 



Mean Dry Bulb Thermometer for the month 

 Max. Temperature occurred at 3 r. m. on the 31st 

 Min. Temperature occurred at 2, 3 & 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 



o 



82.9 

 92.5 



77.5 

 15.0 

 88.0 

 79.5 

 8.5 



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 



„ 80.2 

 2.7 



. 78.3 

 4.6 



Inches. 

 . 0.949 



Troy grain. 

 Mean Weight of Vapour for the month ... ... ... 10.18 



Additional Weight of Vapour required for complete saturation ... 1.61 

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



Mean Max. Solar radiation Thermometer for the month 



o 

 138.8 



Rained 28 days, — Max. fall of rain during 24 hours 

 Total amount of rain during the month 

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

 meter during the month 

 Prevailing direction of the Wind ... S. by E, S. S. E. & S. 



Inches. 

 1.43 

 10.19 



9.22 



* Height 70 feet 10 inches above ground. 



