lxxviii 
Meteorological Observations. 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor GeneraV s Office , Calcutta , 
in the month of January , 1862. 
Monthly Results. 
Mean height of the Barometer for the month, 
Max. height of the Barometer occurred at 10 A. M. on the 3rd, 
Min. height of the Barometer occurred at 3 A. M. on the 27th, 
'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, .. 
Inches. 
30.009 
30.183 
29.768 
0.415 
30.084 
29.955 
0.129 
Mean Dry Bulb Thermometer for the month, 
Max. Temperature occurred at 3 P. M. on the 16th, 
Min. Temperature occurred at 7 A. M. on the 20th & 29th, 
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, 
o 
67.0 
78.3 
55.2 
23 1 
75.0 
60.6 
14.4 
o 
Mean Wet Bulb Thermometer for the month, .. .. 61.8 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer,.. 5.2 
Computed Mean Dew-point for the month, .. .. 58.7 
Mean Dry Bulb Thermometer above computed Mean Dew-point, .. 8.3 
Inches 
Mean Elastic force of Vapour for the month,.. .. .. 0.501 
Troy grains 
Mean Weight of Vapour for the month, .. .. .. 5.55 
Additional Weight of Vapour required for complete saturation, .. 1.75 
Mean degree of humidity for the month, complete saturation being unity, 0.76 
Inches 
B-ained 7 days, Max. fall of rain during 24 hours, 
Total amount of rain diming the month, 
Prevailing direction of the Wind, 
1.03 
3sr. 
