Meteorological Observatons. xxiii 



Abstract of the Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the month of March 1869. 

 Monthly Results. 



Inches. 



Mean Lei glit of tLc Barometer for tLe montL .. . ... ... 29.871 



Max. height of the Barometer occurred at 9 a. m. on the 10th. ... 30.092 



Min. height of the Barometer occurred at 4 p.m. on the 19th. ... 29.731 



Extreme range of the Barometer during the month ... ... 0.361 



Mean of the daily Max. Pressures ... ... ... ... 29.951 



Ditto ditto Min. ditto ... ... ... ... 29.807 



Mean daily range of tLe Barometer during tLe montL ... ... 0.144 



Mean Dry Bulb TLermometer for the month 

 Max. Temperature occurred at 4 p. m. on the 31st. 

 Min. Temperature occurred at 9 a. m. on the 10th 

 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... ... 14.8 



80.1 



94.5 

 65.8 

 28.7 

 88.2 

 73.4 



Mean "Wet Bulb Thermometer for the month ... ... ... 73.3 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 6.8 



Computed Mean Dew-point for the month ... ... ... 68.5 



Mean Dry Bulb TLermometer above computed mean Dew-point ... 11.6 



Indies. 



Mean Elastic force of Yapour for tLe montL ... ... ... 0.692 



Troy grain. 



Mean Wei gLt of Vapour for tLe montL ... ... ... 7.47 



Additional WeigLt of Vapour required for complete saturation ... 3.37 

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



o 



Mean Max. Solar radiation Thermometer for the month. ,,. ... 126.7 



Inches. 



Rained 8 days, — Max. fall of rain during 24 Lours ... ... 2.32 



Total amount of rain during tLe montL ... ... ... 4.59 



Total amount of rain indicated by tLe Gauge attacLed to tLe anemo- 

 meter during tLe montL ... ... ... ... ... 3.45 



Prevailing direction of tLe Wind S. W., & S. S. W. 



