Meteorological Observations. XXXix 
Abstract of the Results of the Hourly Meteorological Observations 
~ taken at the Surveyor General's Office, Calcutta, 
in the month of May, 1865. 
Montuty Resvrts. 


; Inches 
Mean height of the Barometer for the month, .. ee os 29.651 
Max. height of the Barometer occurred at 9 a. M. on the 13th, -- 29.854 
Min. height of the Barometer occurred at 4 Pp. M. on the 30th, es 29.415 
Extreme range of the Barometer during the month, oe «- 0.439 
Mean of the Daily Max. Pressures, .. or ee ee 29.719 
Ditto ditto Min: ditto, .. ae ee +» 29.578 
Mean daily range of the Barometer during the month, .. ee «=, 141 
o 
Mean Dry Bulb Thermometer for the month, .. ee ee 83.4 
Max. Temperature ocewred at 3 &4P.M.onthe 5th, .. oe 94.8 
Min. Temperature occurred at 7 a. M. on the 10th, sc ma 73.0 
Extreme range of the Temperature during the month, Ae on 21.8 
Mean of the daily Max. Temperature, Ae ee os 90.3 
Ditto ditto Min. ditto, .. oc oe 80 78.0 
Mean daily range of the Temperature during the month, .. we 12.8 
Mean Wet Bulb Thermometer for the month, .. ve sp 78.9 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, .. 4.5 
Computed Mean Dew-point for the month, .. ae ee 75.7 
Mean Dry Bulb Thermometer above computed Mean Dew-point, ae Lf 
Inches 
Mean Elastic force of Vapour for the month, .. mc so. OLS7S 
Troy grains 
Mean Weight of Vapour for the month, 56 AC ne 9.36 
Additional Weight of Vapour required for complete saturation, ee 2.60 
Mean degree of humidity for the month, complete saturation being unity, 0.78 
Inches 
Rained 22 days, Max. fall of rain during 24 hours, ae an 247 
Total amount of rain during the month, ae as =e 15.94 
Prevailing direction of the Wind, .. os ee 8. &5S. E. 

