Meteorological Observations. XV 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General's Office, Calcutta, 
in the month of September, 1863. 
Monvuny Rursupts. 
Inches 
Mean height of the Barometer for the month, .. oo -- 29.643 
Max. height of the Barometer occurred at 9 a. M. on tho 19th, ao. 207s 
Min. height of the Barometer occurred at 3 & 4 P.M. on the 16th, .. 29.482 
Hatreme range of the Barometer during the month, 50 -. 0.296 
Mean of the Daily Max. Pressures, .. a ce -- 29.703 
Ditto ditto Min. ditto, .. S60 a0 so) ABS 7/9) 
Mean daily range of the Barometer during the month,  .. o- «=-: 0.1 24 
) 
Mean Dry Bulb Thermometer for the month, .. a oe 82.7 
Max. Temperature occurred at 2 P. M. on the 4th, ee oe 90.6 
Min. Temperature occurred at 4 a. M. on the 14th, 60 o< 77.8 
Extreme range of the Temperature during the month, so oe 12.8 
Mean of the daily Max. Temperature, 40 ee oo 87.2 
Ditto ditto Min. ditto, .. ae 50 bo 79.6 
Mean daily range of the Temperature during the month, .. ee 7.6 
Mean Wet Bulb Thermometer for the month, .. ae Ac 79.6 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, .. 3.1 
Computed Mean Dew-point for the month, .. 2 as 77 A 
Mean Dry Bulb Thermometer above computed Mean Dew-point, 00 5.3 
Inches 
Mean Elastic force of Vapour for the month, .. ale) es |) 0,922 
Troy grains 
Mean Weight of Vapour for the month, dc ee a6 9.91 
Additional Weight of Vapour required for complete saturation, te 1.81 
Mean degree of humidity for the month, complete saturation being unity, 0.85 
Inches 
Rained 23 days, Max. fall of rain during 24 hours, oe ee 2.12 
Total amount of rain during the month, Oc oe -- 10.33 
Prevailing direction of the Wind, .. ee oe NWS. H&E. 
