XXVI 



Meteorological QLsenalom. 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's OJice, Calcutta, 



in the month of September 1868. 



Monthly Kesults. 



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



•Max. height of the Barometer occurred at 9 a. m. on the 1st. 



Min. height of the Barometer occurred at 5 p.m. on the 17th. 



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 ... 



ilnches. 



29.682 

 . 29.894 

 . 29.447 

 . 0.447 

 . 29.741 

 . 29.616 

 . 0.125 



Mean Dry Bulb Thermometer for the month 

 Max. Temperature occurred at 2 p. m. on the 3rd. 

 Min. Temperature occurred at 8 a. m. on the 29th. ... 

 Extreme range of the Temperature during the month 

 Mean of the daily Max. Temperature ... 



Ditto ditto Min. ditto, 

 Mean dally range of the Temperature during the month, 



83.1 



91.8 

 77.4 

 14.4 

 88.0 

 79.6 

 8.4 



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 



80.4 

 2.7 



78.5 

 4.6 



Inches. 

 0.955 



Troy grain. 



Mean Weight of Vapour for the month ... ... _ ... 10.25 



Additional Weight of Vapour required for complete saturation ... 1.61 

 Mean degree of humidity for the month, complete saturation being unity 0.86 



Inches. 



Eained 25 days,— Max. fall of rain during 24 hours ... ... 3.10 



Total amount of rain during the month ... ... ... 15-69 



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

 meter during the month ... ... ••• Q 10 * 59 



Prevailing direction of the Wind. . . .„ Q- & fe - -"*• 



$Tote.— The clock attached to the Anemometer being out of order from 4th, to 

 '8th, the Max. Pressure and Bain could not be registered. 



