Meteor ologica I Observa tions. 



xlvii 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Ojjice, Calcutta, 



in the month of June 1867. 



Monthly Results. 



Mean height of the Barometer for the month... 

 Max. height of the Barometer occurred at 9 a. m. on the 7th 

 Min. height of the Barometer occurred at 4 p.m. on the 18th 

 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 month ... 



Inches. 



. 29.576 

 . 29.756 



29.325 

 . 0.431 



29.036 

 . 29.511 

 . 0.125 



Mean Dry Bulb Thermometer for the month 

 Max. Temperature occurred at 2 p. m. on the 2nd 

 Min. Temperature occurred at 10 a. m. on the 7th 

 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. 



84.9 

 99.6 

 73.8 

 25.8 

 91.7 

 80.2 

 11.5 



Mean "Wet Bulb Thermometer for the month ... ... ... 80.7 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 4.2 



Computed Mean Dew-point for the month ... ... ... 77.8 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 7.1 



Inches. 

 Mean Elastic force of Vapour for the month ... ... ... 0.934 



Troy grain. 



Mean Weight of Vapour for the month ... ... ... 9.99 



Additional Weight of Vapour required for complete saturation ... 2.50 

 Mean degree of humidity for the month, complete saturation being unity 0.80 



Inches. 



Rained 23 days,— Max. fall of rain during 24 hours ... ... 1.10 



Total amount of rain during the month ... ... ... 6.12 



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

 meter during the month ..'. ... ... ... ... 5.40 



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



