Meteorological Observations. 1a) 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General’s Office, Calcutta, 
in the month of January 1871. 
Monruty Resv tts. 
Inches. 
Mean height of the Barometer for the month.. ... 29.983 
Max. height of the Barometer occurred at 9a. M. onthe 27th. ... 30.148 
Min. height of the Barometer occurred at 4 P.M. onthe Ist. ... 29.843 
Extreme range of the Barometer during the month BS 2. ROR 
Mean of the daily Max. Pressures... ia ae ... 30.062 
Ditto ditto Min. ditto : “ot .». 29.926 
Mean daily range of the Barometer during the month dea «« 0136 
oO 
Mean Dry Bulb Thermometer for the month _... ee a ye 
Max. Temperature occurred at 3 p. M. on the Ist. rn > Oe 
Min. Temperature occurred at 7 a.m, on the 5th. bad Se SAG 
Extreme range of the Temperature et the month at > aod eee 
Mean of the daily Max. Temperature .. sha “ps od. 
Ditto ditto Min. ditto, .. = . 69.8 
Mean daily range of the Temperature during the month.. at 
Mean Wet Bulb Thermometer for the month .. 60.9 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 6.7 
Computed Mean Dew-point for the month é 55.5 
Mean Dry Bulb Thermometer above computed n mean Dew- -point .. 12.1 
| aahse 
Mean Elastic force of Vapour for the month .., es .. 0.450 
Troy grain. 
Mean Weight of Vapour for the month .. 4.98 
Additional Weight of Vapour required for complete saturation ... 2 46 
Mean degree of humidity for the month, complete saturation being unity 0.67 
o 
Mean Max. Solar radiation Thermometer for the month ... 132.4 
Inches. 
Drizzled 1 day,—Max. fall of rain during 24 hours... cas EINER 
Total amount of rain during the month oo See 
Total amount of rain indicated by the Gauge* attached to the anemo- 
meter during the month 
Prevailing direction of the Wind... eas WN Ww, ‘&W. 
* Height 70 feet 10 inches above ground. 
