Meteorological Observations. XXX 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General’s Office, Calcutta, 
wm the month of April 1871. 
Monrnrty Resvcrs. 
Inches. 
Mean height of the Barometer for the month.. »». 29.772 
Max. height of the Harometer occurred at 9. ‘uw. on the 11th. ». 29.948 
Min. height of the Barometer occurred at 7 Pp. M. on the 14th. ... 29.631 
Eatreme range of the Barometer during the mouth “be ne Oals 
Mean of the daily Max. Pressures... a af . 29.843 
Ditto ditto Min. ditto - AS «:2/ 29.702 
Mean daily range of the Barometer during the month .., .. 0.141 
o 
Mean Dry Bulb Thermometer for the month ia,,, See 
Max. Temperature occurred at : & 3p. M. on, the 12th & 30th ww. 94.6 
Min. Temperature occurred at 2 a.m, on the 17th. eae je VERS 
Extreme range of the Temperature during the month ah 3.37, Soe 
Mean of the daily Max. Temperature ., hi Ne he SOU 
Ditto — ditto Min. ditto, " jas, Mae 
Mean daily range of the Temperature during the month, ia 2 14g 
Mean Wet Bulb Thermometer for the month ... 77.9 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 4.8 
Computed Mean Dew-point for the month ; 74.5 
Mean Dry Bulb Thermometer above computed m mean Dew- -point ., 8.2 
“Hoek 
Mean Elastic force of Vapour for the month ,., ove . 0.840 
Troy grain. 
Mean Weight of Vapour for the month ar ous’ 2 9.09 
Additional ‘Weight of Vapour required for complete saturation |... 2.69 
Mean degree of humidity for the month, complete saturation being unity 0.77 
° 
Mean Max. Solar radiation Thermometer for the month ,., 143.0 
Inches. 
Rained 14 days,—Max. fall of rain during 24hours x, ot, LS 
Total amount of rain during the month 6.72 
Total amount of rain indicated by the Gauge* attached to the anemo- 
meter during the month __... ae wa ww. 4.64 
Prevailing direction of the Wind... ave 8,8 by W,&SSW. 
* Height 70 feet 10 inches aboye ground. 
