Meteorologica lL Observations. XX1 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General’s Office, Caleutta, 
im the month of March 1871. 
Monruiy Resucrs. 
Inches. 
Mean height of the Barometer for the month.. ... 29.850 
Max. height of the Barometer occurred at 10. M.onthe 6th. ... 30.050 
Min. height of the Barometer occurred at 5 Pp. M. on the 15th. ... 29.638 
Extreme range of the Barometer during the month on .. 0.412 
Mean of the daily Max. Pressures... ais ai ... 29.926 
Ditto ditto Min. ditto al ... 29.783 
Mean daily range of the Barometer during the month... . 0.143 
o 
Mean Dry Bulb Thermometer for the month ie se wo. 49.4 
Max. Temperature occurred at 4 Pp. M. on the 26th. is «> Bie 
Min. Temperature occurred at 6 & 7 a. M, on the 4th. e > 640 
Extreme range of the Temperature curing the month Ee cob |) eh 
Mean of the daily Max. Temperature .. we ise ok ere 
Ditto — ditto Min. ditto, cba AO 
Mean daily vange of the Temperature during the month. = | 68 
Mean Wet Bulb Thermometer for the month... 72.2 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 7.2 
Computed Mean Dew-point for the month Fe 67.2 
Mean Dry Bulb Thermometer above computed mean Dew- -point ., 12.2 
hpchiea! 
Mean Elastic force of Vapour for the month .., se .. 0.664 
Troy grain. 
Mean Weight of Vapour forthe month. cme Pi i 
Additional Weight of Vapour required for complete saturation ... 3.45 
Mean degree of humidity for the month, complete saturation being unity 0.68 
o 
Mean Max. Solar radiation Thermometer for the month .., 142.2 
Inches. 
Rained 5 days,—Max. fall of rain during 24 hours... sis. YoSe 
Total amount of rain during the month we OAL 
Total amount of rain indicated by the Gauge* attached to the ae ee 
meter during the month _. = “on : 
Prevailing direction of the Wind.. a s by W.&SS W. 
* Height 70 feet 10 inches above ground. 
ay 
