Meteorological Observalons. lvi 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the month of July 1869. 



Monthly Results. 



Indies. 



Mean height of the Barometer for the month... ... ... 29.547 



Max. height of the Barometer occurred at 10 a. m. on the 9th. ... 29.744 



Min. height of the Barometer occurred at 5 p.m. on the 18th. ... 29.358 



Extreme range of the Barometer during the month ... ... 0.386 



Mean of the daily Max. Pressures ... ... ... ... 29.599 



Ditto ditto Min. ditto ... ... ... ... 29.486 



Mean daily range of the Barometer during the month ... ... 0.113 



o 



Mean Dry Bulb Thermometer for the month ... 83.9 



Max. Temperature occurred at 4 p. m. on the 28th. ... ... 92.7 



Min. Temperature occurred at 4 a. m, on the 21st. ... ... 77.5 



Extreme range of the Temperature during the month 15.2 



Mean of the daily Max. Temperature ... ... 88.4 



Ditto ditto Min. ditto, ... ... 80.6 



Mean daily range of the Temperature during the month... ... 7.8 



Mean Wet Bulb Thermometer for the month ... ... ... 80.9 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 3.0 



Computed Mean Dew-point for the month ... ... ... 78.8 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 5.1 



Inches. 

 Mean Elastic force of Vapour for the month ... ... ... 0.964 



Troy grain. 



Mean Weight of Vapour for the month ... ... ... 10.34 



Additional Weight of Vapour required for complete saturation ... 1.79 

 Mean degree of humidity for the month, complete saturation being unity 0.85 



o 



Mean Max. Solar radiation Thermometer for the month ... (broken) 



Inches. 



Kained 24 days,— Max. fall of rain during 24 hours ... . ... 2.89 



Total amount of rain during the month ... ... ... 14.54 



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

 meter during the month ... ... ... ... ... 13.22 



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



