Meteorological Observations. Ixxix 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General's Office, Calcutta, 
in the month of April, 1863. 
Monruty Resuvrs. 
Inches 
Mean height of the Barometer for the month, 30 ac 29.705 
Max. height of the Barometer occurred at 10 a. M. on the 21st, .. 29.849 
Min. height of the Barometer occurred at 5&6 Pp. M. onthe 4th & 7th, 29.506 
Extreme range of the Barometer during the month, 50 ae 0.343 
Mean of the daily Max. Pressures, 20 s0 co 29.777 
Ditto ditto Min. ditto, 56 a0 no 29.622 
Mean daily range of the Barometer during the month, .. 56 0.155 
() 
Mean Dry Bulb Thermometer for the month, sie ee 84.4: 
Max. Temperature occurred at 4 Pp. mM. on the 6th, 40 oe 99.8 
Min. Temperature occurred at 6 p. mM. on the 8th, on se 69.8 
Extreme range of the Temperature during the month, .. ate 30.0 
Mean of the daily Max. Temperature, sie O° ate 93.6 
Ditto ditto Min. ditto, : ae 50 50 76.6 
Mean daily range of the Temperature during the month, ba 17.0 
0 
Mean Wet Bulb Thermometer for the month, ; a 77 A 
Mean Dry Bulb Thermometer above Mean Wet Bulb iPhortncictor: 7.0 
Computed Mean Dew-point for the month, oe ee 72.5 
Mean Dry Bulb Thermometer above computed Mean Dew-point, .. 11.9 
Inches 
Mean Elastic force of Vapour for the month,.. ue es 0.787 
Troy grains 
Mean Weight of Vapour for the month, Sc ole o. 8.42 
Additional Weight of Vapour required for complete saturation, ee 3.89 
Mean degree of humidity for the month, complete saturation being unity, 0.68 
Inches 
Rained 10 days, Max. fall of rain during 24 hours, .. 30 0.78 
Yotal amount of rain during the month, .. oe a 2.43 
Prevailing direction of the Wind, ac oe Ac S. 
