xl Meteorological Observatons. 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the month of May 1869. 



Monthly Kesults. 



Inches. 



Mean height of the Barometer for the month... ... ... 29.662 



Max. height of the Barometer occurred at 11 p. m. on the 2nd. ... 29.918 



Min. height of the Barometer occurred at 6 p.m. on the 16th. ... 29.317 



Extreme range of the Barometer during the month ... ... 0.601 



Mean of the daily Max. Pressures ... ... ... ...29.735 



Ditto ditto Min. ditto ... ... ... ... 29.581 



Mean daily range of the Barometer during the month ... ... 0.154 



Mean Dry Bulh Thermometer for the month ... ... ... 87.0 



Max. Temperature occurred at 3 p. M. on the 12th 100.0 



Min. Temperature occurred at 4 a. m. & 11 p. m, on the 3rd. & 22nd. 75.5 



Extreme range of the Temperature during the month 24.5 



Mean of the daily Max. Temperature .. . ... 94.7 



Ditto ditto Min. ditto, ... ... 80.1 



Mean daily range of the Temperature during the month... ... 14.6 



Mean Wet Bulh Thermometer for the month ... ... ... 80.8 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 6.2 



Computed. Mean Dew-point for the month ... ... ... 77.1 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 9.9 



Inches. 



Mean Elastic force of Vapour for the month ... ... ... 0.913 



Troy grain. 

 Mean Weight of Vapour for the month ... ... ... 9.72 



Additional Weight of Yapour required for complete saturation ... 3.57 

 Mean degree of humidity for the month, complete saturation being unity 0.73 



o 

 Mean Max. Solar radiation Thermometer for the month. ... ... 131.3 



Inches. 



Rained 14 days, — Max. fall of rain during 24 hours ... ... 2.09 



Total amount of rain during the month ... ... ... 3.32 



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

 meter during the month ... ... ... ... ... 2.43 



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



