Meteorological Observations. vii 



Abstract of the Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the month oj May, 1860. 



Monthly Besttlts. 



Mean height of the Barometer for the month, 



Max. height of the Barometer, occiu'red at 9 A. M. on the 5th, 



Min. height of the Barometer, occurred at 5 P. M. on the 31st, 



Extreme Range of the Barometer dming the month, 



Mean of the Daily Max. Pressures, 



Ditto ditto Min. ditto, .. 

 Mean daily range of the Barometer during the month, 



Inches 

 29.613 

 29.845 

 29.417 



0.428 

 29.682 

 29.537 



0.145 



Mean Dry Bulb Thermometer for the month, 

 Mas. Temperature occurred at 3 p. M. on the 21st, 

 Min. Temperature occurred at 1 A. M.on the 4th, 

 'Extreme range of the Temperature during the month, 

 Mean of the daily Mas. Temperature, 



Ditto ditto Min. ditto, 

 Mean daily range of the Temperature during the month, 



Mean Wet Bulb Thermometer for the month, 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, 



Computed Mean Dew Point for the month, 



Mean Dry Bulb Thermometer above computed Mean Dew Point, 



Mean Elastic force of vapour for the month, . . , . 



88.7 

 105.8 

 72.8 

 33.0 

 98.7 

 81.0 

 17.7 



o 



S1.4 

 7.3 



77.7 



11.0 



Inches 



0.931 



Troy grains 

 Mean weight of Vapour for the month, .. .. .. 9.88 



Additional weight of Vapour required for complete saturation, „ . 4.08 



Mean degree of humidity for the month, complete saturation being unity, 0.71 



Rained 8 days,— -Max. fall of rain during 24 hours, 

 Total amount of rain during the month, 

 Prevailing direction of the Wind, 



Inches 

 0.94 

 2.21 



S. &S.E, 



