xl Meteorological Observations. 
Abstract of the Tesults of the Hourly Meteorological Observations. 
taken at the Surveyor General’s Office, Calcutta, 
im the month of May 1871. 
Montuty REsvtts. 
Inc hes 
Mean height of the Barometer for the month.. «. 29.678 
Max. height of the Barometer occurred at 9 A. "mM. on the "Ond. ... 29.869 
Min. height of the Barometer occurred at 5 p.m. on the 23rd. ... 29.428 
Extreme range of the Barometer during the month on . 0.441 
Mean of the daily Max. Pressures... eee an . 29.741 
Ditto ditto Min. ditto 4 othe «. 29.603 
Mean daily range of the Barometer during the month .., oa. 0.158 
Oo 
Mean Dry Bulb Thermometer for the month _,., see oe) Ou 
Max. Temperature occurred at 4p. M. on the 17th. ae oo . DOME 
Min. Temperature occurred at 5 a. M, on the 5th. ee os eee 
Extreme range of the Temperature ae the month 7 oa 
Mean of the daily Max. Temperature .. is ae so) 
Wri. dito Man, 9 editto, ... | 
Mean daily range of the Temperature during the month.. w. 14.0 
Mean Wet Bulb Thermometer for the month ... 73.7 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 4.6 
Computed Mean Dew-point for the month "5.5 
Mean Dry Bulb Thermometer above computed n mean Dew-point .. 7.8 
Tote 
Mean Elastic force of Vapour for the month .., vee 1. 0.868 
Troy grain. 
Mean Weight of Vapour for the month - oe =~ Olea 
Additional Weight of Vapour required for complete saturation oo =) 
Mean degree of humidity for the month, complete saturation being unity 0.78 
oO 
Mean Max. Solar radiation Thermometer for the month ,,, 144.4 
Inches. 
Rained 17 days,—Max. fall of rain during 24 hours... 2 
Total amount of rain during the month . 11.08 
Total amount of rain indicated by the Gauge* attached to the anemo- 
meter during the month ack oot aut 340 9.33 
Prevailing direction of the Wind... ae SSW. 
* Height 70 feet 10 inches above ground. 
oe al: 
