X H Meteorological Observations. 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta,. 



in the month of May 1868-. 



Monthly Results. 



Indies. 



Mean height of the Barometer for the month... ... ... 29.761 



Max. height of the Barometer occurred at 10 a. m. on the 17th. ... 29.989 



Min. height of the Barometer occurred at 6 p.m. on the 7th. ...29.557 



Extreme range of the Barometer during the month ... ... 0.432 



Mean of the daily Max. Pressures ... ... ... ...29.836 



Ditto ditto Min. ditto ... ... ... ... 29.683 



Mean daily range of the Barometer during the month ... ... 0.153 



Mean Dry Bulb Thermometer for the month ... , 84.3 



Max. Temperature occurred at 2 p. m. on the 6th. 98.0 



Min. Temperature occurred at 8 p. m. on the 11th 71.4 



Extreme range of the Temperature during the month 26.6 



Mean of the daily Max. Temperature ... ... 93.0 



Ditto ditto Min. ditto, ... ... 77.5 



Mean daily range of the Temperature during the month... ... 15.5 



Mean Wet Bulb Thermometer for the month ... ... ... 78.8 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer ^5.5 

 Computed Mean Dew-point for the month ... ... > ... 74.9 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 9.4 



Inches. 



Mean Elastic force of Yapour for the month ... ... ... 0.851 



Troy grain. 



Mean Weight of Yapour for the month ... ... _ ... 9-1 1 



Additional Weight of Yapour required for complete saturation ... 3.17 

 Mean degree of humidity for the month, complete saturation being unity 0.74 



Inches. 



Earned 15 days,— Max. fall of rain during 24 hours ... ... 1-56 



Total amount of rain during tbe month ... ... ••• 5.80 



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

 meter during the month ... ... -•• ••• Q "W 



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



