Meteorological Observations. xxxix 



Abstract of the Results of the Hoiorly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the month of September, 1860. 



Monthly Eestjlts. 



Indies 



Mean height of the Barometer for the month, .. .. 29.667 



Max. height of the Barometer occurred at 10 A. ir. on the 28th, . . 29.796 



Min. height of the Barometer occurred at 4 A. M. on the 20th, .. 29.417 



Extreme range of the Barometer during the month, .. . . 0.379 



Mean of the Daily Max. Pressures, . . . . . . 29.730 



Ditto ditto Min. ditto, ... .. .. .. 29.600 



Mean daily range of the Barometer during the month, .. .. 0.130 



Mean Dry Bulb Thermometer for the month, 



Max. Temperature occurred at 2 & 3 p. m. on the 22nd & 29th, 



Man. Temperature occurred at 4 A. M. on the 21st, 



'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, 

 Mean Wet Bulb Thermometer for the month,.. 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, ., 

 Computed Mean Dew-point for the month, 

 Mean Dry Bulb Thermometer above computed Mean Dew-point, 



Mean Elastic force of Vapour for the month, .. 



83.4 

 91.2 



77.2 

 14.0 

 88.5 

 80.3 



8.2 

 80.4 



3.0 

 78.9 



4.5 



Inches 

 0.967 



Troy grains 

 10.37 



Mean Weight of Yapour for the month, 



Additional Weight of Vapour required for complete saturation, . . 1.59 



Mean degree of humidity for the month, complete saturation being unity, 0.S7 



Rained 19 days, Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

 Prevailing direction of the Wind, .. 



Inches 



1.46 



7.13 



S. &E.&S. E. 



