Meteorological Observations. XXX1X 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General’s Office, Calcutta, in the 
month of May 1866. 
MontHiy ReEsvtts. 
Inches 
Mean height of the Barometer for the month,.. 1. 29.646 
Max. height of the Barometer occurred at 9 a. m.onthe Ist, ... 29.900 
Min. height of the Barometer occurred at 5 p. M. on the 29th, ... 29.476 
Extreme range of the Barometer during the month, ne ... 0.424, 
Mean of the daily Max. Pressures, _... see a ... 29.708 
Ditto ditto Min. ditto ... 29.571 
Mean daily range of the Barometer during the month, se mOuleaa 
Oo 
Mean Dry Bulb Thermometer for the month, ‘ ae Sop, esi fed) 
Max. Temperature occurred at 3 P. M. on the 27th ae aL Oa 
Min. Temperature occurred at 5 a. M. on the 3rd . ie We mney Lt 
Fixtreme range of the Temperature during the month, on soo Al TL 
Mean of the daily Max. Temperature . He ~ ne GOne 
Ditto ditto Min. ditto, 4-25 Fe 9.0 
Mean daily range of the Temperature during the month,.. wanny Gs 
Mean Wet Bulb Thermometer for the month, .. 80.7 
Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, 6.3 
Computed Mean Dew-point for the month, 76.9 
Mean Dry Bulb Thermometer above computed mean Dew- -point. . 10.1 
i eepee 
Mean Elastic force of Vapour for the month, .., 50 », 0.908 
Troy grains. 
Mean Wei ae v Vapour for the month ; cao POO 
Additional ht of Vapour required for complete saturation, don eeeisoe} 
Mean degree of umidity for the month, complete saturation being unity 0.73 
Inches. 
Rained 9 days,—Max. fall of rain during 24 hours site 4) 0:88 
Total amount of rain during the month, ae 2206 
Total amount of rain indicated by the Gauge attached to the anemo- 
meter during the month. 1.85 
Prevailing direction of the Wind, ie §.&8.8.W.&S. 8. E. 
