Meteorological Observations. 



XXIV 



Abstract of the Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the mouth of March 1875. 



Monthly Hesults. 



Mean height of the Barometer for the month 

 Max. height of the Barometer occurred at 10 a. sr. on the 5th 

 Min. height of the Barometer occurred at 5 p. jr. on the 11th 

 JSxtreme range of the Barometer during the month 

 Mean of the daily Max. Pressures 

 Ditto ditto Min. ditto 

 Mean daitg range of the Barometer during the month 



Indies. 

 29.821 

 30.014 

 29.612 



0.402 

 29.892 

 29.751 



0.141 



Mean Dry Bulb Thermometer for the month 

 Max. Temperature occm-red at 2 & 3 p. ir. on the 31st 

 Min. Temperature occurred at 5 & 6 A. M. on the 1st 

 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 

 81.7 

 96.5 

 67.7 

 28.8 

 91.8 

 74.5 

 17.3 



Mean Wet Bull) Thermometer for the month ... ... ... 75.2 



Mean Dry Bull) Thermometer ahove Mean Wet Bulh Thermometer 6.5 



Computed Mean Dew-point for the month ... ... . ... 70.6 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 11.1 



Indies. 

 Mean Elastic force of Vapour for the month ... ... ... 0.741 



Troy grain. 

 Mean Weight of Vapour for the month ... ... ... 7.97 



Additional Weight of Vapour required for complete saturation ... 3.10 

 Mean degree of humidity for the month, complete saturation being unity 0.70 



Mean Max. Solar radiation Thermometer for the month 



o 

 136.4 



Indies. 

 Drizzled 4 days, — Max. fall of rain during 24 hours ... ... Nil 



Total amount of rain during the month ... ... ... IN" il 



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

 meter during the month ... ... ... ... ... Nil 



Prevailing direction of the Wind ... S. by E., S. k S. W. 



* Height 7u feet 10 Laches above ground, 



