Meteorological Observations. 



xxxi x 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the month of May 1867. 



Monthly Results. 



Mean height of the Barometer for the month... 



Max. height of the Barometer occurred at 10 p. m. on the J 1th 



Min. height of the Barometer occurred at 6 p.m. on the 26th 



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 mouth ... 



Inches. 



. 29.639 

 . 29.838 

 29.374 

 . 0.464 

 . 29.702 

 . 29.563 

 . 0.139 



Mean Dry Bull) Thermometer for the month 

 Max. Temperature occurred at 3 p. M. on the 27th 

 Min. Temperature occurred at 5 a. m. on the 13th 

 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.. 



87.7 



106.0 



72.5 



33.5 



97.4 

 80.7 

 16.7 



Mean Wet Bulb Thermometer for the month ... 



Meau Dry Bulb Theritiometer 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 ... 



80.4 



7.3 



76.0 



11.7 



Inches. 



. 0.882 



Troy grain. 



Mean Weight of Vapour for the month ... ... ... 9.37 



Additional Weight of Vapour required for complete saturation ... 4.19 

 Mean degree of humidity for the month, complete saturation being unity 0.69 



Inches. 



Eained 10 days, — Max. fall of rain during 24 hours ... ... 1.09 



Total amount of rain during the month ... ... ... 2.46 



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

 meter during the month ... ... ... ... ... 2.33 



Prevailing direction of the Wind 'S., S. S. E. & S. S. W. 



