Meteorological Observations, 
xxxix 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General's Office, Calcutta, 
in the month of August, 1861. 
Monthly Results. 
Indies 
Mean height of tlie Barometer for the month, .. 29.597 
Max. lieiglit of the Barometer occurred at 9 A. M. on the 5th, .. 29.795 
Min. height of the Barometer occurred at 4 p. m. on the 31st, .. 29.355 
"Extreme range of the Barometer during the month, .. .. 0.440 
Mean of the daily Max. Pressures, .. .. ,, 29.653 
Ditto ditto Min. ditto, .. .. 29.531 
Mean daily range of the Barometer during the month, .. ,. 0.122 
o 
Mean Dry Bulb Thermometer for the month, .. 83.0 
Max. Temperature occurred at 3 P. M. on the 6th, .. .. 91.8 
Min. Temperature occurred at 1 P. M. on the 9th, .. 76.0 
Extreme range of the Temperature during the month, .. .. 15*8 
Mean of the daily Max. Temperature, .. .. .. 88.2 
Ditto ditto Min. ditto, .. .. .. 79.7 
Mean daily range of the Temperature during the month, 8.5 
o 
Mean Wet Bulb Thermometer for the month, .. ,V 79.7 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer,.. 3.3 
Computed Mean Dew-point for the month, .. .. 78.0 
Mean Dry Bulb Thermometer above computed Mean Dew-point, .. 5.0 
Inches 
Mean Elastic force of Vapour for the month,. • .. .. 0.940 
Troy grains. 
Mean Weight of Vapour for the month, .. .. .. 10.09 
Additional Weight of Vapour required for complete saturation, .. 1.73 
Mean degree of humidity for the month, complete saturation being unity, 0.85 
Rained 26 days, Max. fall of rain during 24 hours, 
Total amount of rain during the month, 
Prevailing direction of the Wind, •. 
Inches 
.. 2.58 
16.12 
S. & E. & S. E. 
