lviii Meteorological Observations. 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



iu the mouth of July 1873. 



Monthly Results. 



Indies. 

 Mean height of the Barometer for the month ... ... ... 29.483 



Max. height of the Barometer occurred at 10 and 11 a.m. on the 30th... 29.610 

 Mill, height of the Bai-ometer occurred at 4 p. m. on the 18th ... 29.194 



Extreme range o? the Barometer during the month ... ... 0.422 



Mean of the daily Max. Pressures ... ... ... ... 29.536 



Ditto ditto Min. ditto ... ... ... ... 29.422 



Mean daily range of the Barometer during the mouth ... ... 0.114 



o 



Mean Dry Bulb Thermometer for the month ... ... ... 83.4 



Max. Temperature occurred at 3 r. m. on tlio 10th and 22nd ... 92.0 



Min. Temperature occurred at 10 p.m. and 2 a.m. on the 28th and 29th.. 77.5 



Extreme range ? of the Temperature during the month ... ... 14.5 



Mean of the daily Max. Temperature ... ... ... ... 88.2 



Ditto ditto Min. ditto, ... ... ... ... 80.4 



ifeaa daity range of the Temperature during the month ... ... 7.8 



Mean Wet B i db Thermometer for the month ... ... ... 80.9 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 2.5 



Computed Mean Dew-point for the month ... ... ... 79.1 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 4.3 



Inches. 

 Mean Elastic force of Vapour for the month ... ... ... 0.973 



Troy grain. 

 Mean Weight of Vapour for the month ... ... ... 10.45 



Additional Weight of Vapour required for complete saturation ... 1.51 

 Mean degree of humidity for the month, complete saturation being unity 0.87 



o 



Mean Max. Solar radiation Thermometer for the month ... ... 135.0 



Inches. 



Eained 30 days, — Max. fall of rain during 24 hours n ,.. ... 3.26 



Total amount of rain during the month ... ... ... 14.76 



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

 meter during the month ... ... ... ... ... 13.60 



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



* Height 70 feet 10 inches above ground. 



