lxii 
Meteorological Observations. 
Abstract of the Results of the Hourly Meteorological Observations 
talcen at the Surveyor General' s Office , Calcutta , 
in the month of December , I860. 
Monthly Kesttlts. 
Mean height of the Barometer for tho month, 
Max. height of the Barometer occurred at 9 A. M. on the 31st, 
Min. height of the Barometer occurred at 4 p. M. on the 7th, 
Extreme range of the Barometer during the month. 
Mean of the Daily Max. Pressui-es, . . • • 
Ditto ditto Min. ditto, 
Mean daily range of the Barometer during the month, 
Inches 
30.012 
30.172 
29.905 
0.267 
30.092 
29.959 
0.133 
Mean Dry Bulb Thermometer for the month, 
Max. Temperature occurred at 2 P. M. on the 1st, 
Min. Temperature occurred at 6 A. M. on the 31st, . - 
Extreme range of the Temperature during the month, • • 
Mean of the daily Max. Temperature, 
Ditto ditto Min. ditto, 
Mean daily range of the Temperature during the month, 
Mean Wet Bulb Thermometer for the month, 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, 
Computed Mean Dew-point for the mouth, . . 
Mean Dry Bulb Thermometer above computed Mean Dew-point, 
o 
67.2 
80.4 
54.0 
26.4 
78.0 
58.9 
19.1 
60.8 
6.4 
57.0 
10.2 
Mean Elastic force of Vapour for the month, .. 
Inches 
0.473 
Troy grains 
Mean Weight of Vapour for the month, 
Additional Weight of Vapour required for complete saturation, 
Mean degree of humidity for the month, complete saturation being unity. 
Inches 
Nil. 
Nil. 
N. & N. W. 
BainedNo. days, Max. fall of rain during 24 hours , 
Total amount of rain during the month, 
Prevailing direction of tho Wind, .. .. •• 
