Ixxviii 
Meteorological Observations. 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General's Office , Calcutta, 
in the month of February, 186 L. 
Monthly Results. 
Indies 
Mean height of the Barometer for the month, 
Max. height of the Barometer occurred at 10 A. M. on the 19th, 
Min. height of the Barometer occurred at 4 p. it. on the 5th, 
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, 
o 
Mean Dry Bulb Thermometer for the month, . . . , 72.6 
Max. Temperature occurred at 4 P. M. on the 28th, .. .. 90.6 
Min. Temperature occurred at 7 A. M. on the 2nd, .. .. 54.4 
Extreme range of the Temperature during the month, .. .. 36.2 
Mean of the daily Max. Temperature, .. .. .. §4.6 
Ditto ditto Min. ditto, .. .. .. 63.2 
Mean daily range of the Temperature during the month, .. 21.4 
Mean Wet Bulb Thermometer for the month, .. .. 63.4 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, .. 9.2 
Computed Mean Dew-point for the month, .. .. .. 58.8 
Mean Dry Bulb Thermometer above computed Mean Dew-point, .. 13.8 
Inches 
Mean Elastic force of Vapour for the month, .. .. .. 0.503 
.. 29.914 
.. 30.155 
.. 29.668 
0.487 
.. 29.999 
.. 29.848 
.. 0.151 
Troy grains 
Mean Weight of Vapour for the month, .. .. .. 5.49 
Additional Weight of Vapour required for complete saturation, .. 3.17 
Mean degree of humidity for the month, complete saturation being unity, 0.63 
Inches 
Kained No. days, Max. fall of rain during 24 hours, .. .. Nil. 
Total amount of rain during the month, .. .. .. Nil. 
Prevailing direction of the Wind, . . .. W. & S. & S. W. 
