Meteorological Observations. ciii 



Abstract of the Results of the Hourly Meteorological Observations 

 taken at the Surveyor General's Office, Calcutta, 

 in the month of April, 1862. 



Monthly Results. 



Mean height of the Barometer for the month, 

 Max. height of the Barometer occurred at 9 A. M. on the 12th, 

 Min. height of the Barometer occurred at 6 p. m. on the 26th, 

 Extreme range of the Barometer during the month, . . 



Mean of the Daily Mas. Pressures, . 

 Ditto ditto Min. ditto, .. 

 Mean daily range of the Barometer during the month, 



Indies 

 29.752 

 29.959 

 29.536 



0.423 

 29.827 

 29.673 



0.154 



Mean Dry Bulb Thermometer for the month, .. 



Max. Temperature occurred at 3 & 4 p. m. on the 14th, 



Min. Temperature occurred at 8 P. M. on the 29th, 



Extreme range of the Temperature during the month, . . . , 



Mean of the daily Max. 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, 



84.6 

 100.2 

 70.7 

 29.5 

 93.7 

 76.8 

 16.9 

 76.9 

 7.7 

 ^.O 

 11.6 



Inches 

 0.801 



Troy grains 

 8.55- 



Mean Weight of Vapour for the month, 



Additional Weight of Vapour required for complete saturation, . . 3.84 



Mean degree of humidity for the month, complete saturation being unity, 0.69 



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

 Total amount of rain during the month, 

 Prevailing direction of the Wind, .. .. 



Inches 

 0.68 

 2.53 



s, & s. w. 



