Meteorological Observations. XCV 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General’s Office, Calcutta, in the 
month of December 1866. 
Montuty ReEsu.ts. 
Inches. 
Mean height of the Barometer for the menth.. .«. 80.079 
Max. height of the Barometer occurred at 10 a.3t. on the 20th sce AIS 
Min. height of the Barometer occurred at 4p. M. on the 30th ... 29.890 
Extreme range of the Barometer during the month si: ... 0.383 
Mean of the daily Max. Pressures _... ie Be PenaOulton 
Ditto ditto Min. ditto Le ... 80.019 
Mean daily range of the Barometer during the month ... ret Onlse 
Oo 
Mean Dry Bulb Thermometer for the month 
Max. Temperature occurred at 3 p. m. on the Ist 
Min. Temperature occurred at 7 a. M. on the 30th 
Lixtreme range of the Temperature durin ng the month 
Mean of the daily Max. Temperature .. 
Ditto ditto Min. ditto, 
Mean daily range of the Temperature ‘during the month.. 
Ee orn ox 2a 
£2 C9 Sh) CUS 
FPOORROH 
Mean Wet Bulb Thermometer for the month ... 60.7 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 6.4 
Computed Mean Dew-point for the month 55.6 
Mean Dry Bulb Thermometer above computed n mean Dew- -point . 11.5 
oe 
Mean Elastic force of Vapour for the month .., Be »» 0.452; 
Troy grain. 
Mean Weight of Vapour for the month Ne OO 
Additional Weight of Vapour required for complete saturation ... 2.32 
Mean degree of humidity for the month, complete saturation being unity 0.68: 
Inches.. 
Rained No. days,—Max. fall of rain during 24 hours... Gant SENT 
Total amount of rain during the month sone euN DI 
Total amount of rain indicated by the Gauge attached to the anemo- 
meter during the month __.. He Nil 
Prevailing direction of the Wind. . N.&N.N. W.&QN. W. 
