Meteorological Observations. xlvii 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General's Office, Calcutta, 
in the month of June, 1865. 
Montuty Resvpts. 
Inches 
Mean height of the Barometer for the month, .. = -. 29.550 
Max. height of the Barometer occurred at 9 A. M. on the nth, e. 29.740 
Min. height of the Barometer occurred at 4 Pp. M. on the 30th, es 29.352 
Extreme range of the Barometer during the month, od ae 0.388 
Mean of the Daily Max. Pressures,.. ee . ee 29.607 
Ditto ditto Man; ditto, <. 4 ste es 29.489 
Mean daily range of the Barometer during the maith, ae sa OLS 
° 
Mean Dry Bulb Thermometer for the month, .. ae ee 86.1 
Max. Temperature occurred at 4 P. M. on the 24th, oe “3 96.0 
Min. Temperature occurred at 5 A. M. on the 19th, Ae a 77.0 
Extreme range of the Temperature during the month, ae —_ 19.0 
Mean of the daily Max. Temperature, hie ae wa 91.3 
Ditto ditto Min. ditto, .. ir ee “ie 82.2 
Mean daily range of the Temperature during the month, .. ee 9.1 
Mean Wet Bulb Thermometer for the month, .. bs ne 82.1 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, .. 4.0 
Computed Mean Dew-point forthe month, .. ae pe 79.3 
Mean Dry Bulb Thermometer above computed Mean Dew-point, Se 6.8 
‘ Inches 
Mean Blastic force of Vapour for the month, .. ve ee ©=—0.979 

Troy grains 

Mean Weight of Vapour for the month, * hie a 10.44 
Additional Weight of Vapour required for complete saturation, Aa 2.51 
Mean degree of humidity for the month, complete saturation being unity, 0.81 
Inches 
Rained 17 days, Max. fall of rain during 24 hours, iG ae 2.62 
Total amount of rain during the month, + 2 st 8.63 
Prevailing direction of the Wind, .. ee ae S.&8. W. 

