Meteorological Observations. XXX 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General’s Office, Calcutta, in the 
month of Aprit 1866. 
Montuty REsvutts. 
Inches. 
Mean height of the Barometer for the month,... soo BLOTS) 
Max. height of the Barometer occurred at 9 4. M. on the 22nd, ... 30.074 
Min. height of the Barometer occurred at 5 Pp. M. on the llth, ,.. 29.545 
Evtreme } range of the Barometer during the month, fea oa 029 
Mean of the daily Max. Pressures, ... Te ae ... 29.863 
Ditto ditto Min. ditto ... 29.700 
Mean daily range of the Barometer during the ‘month, ». 0.163 
ty) 
Mean Dry Bulb Thermometer for the month, ow 84.1 
Max. Temperature occurred at 4 p. m. on the loth & 15th . ... 102.6 
Min. Temperature occurred at 1 & 3 4. mM. onthe 22nd ,.. w= 68.4 
Extreme range of the Temperature us the month, ie we = B42 
Mean of the daily Max. Temperature .. sr sae aw. 94.0 
Ditto ditto Min. GHIREOY) hac aoe OST, 
Mean daily range of the Temperature during the month,.. ‘en, Lae 
Mean Wet Bulb Thermometer for the month, ... 76.9 
Mean Dry Bulb Tnermometer above Mean Wet Bulb Thermometer, 7.2 
Computed Mean Dew-point for the month, ates on dpleg 
Mean Dry Bulb Thermometer above computed mean Dew- -point. . 12.2 
| Tare 
Mean Elastic force of Vapour for the month, .., <a ws» 0.773 
Troy grains. 
Mean Weight of Vapour for the month we «= 8.28 
Additional Weight of Vapour required for complete saturation, .. 3.93 
Mean degree of humidity for the month, complete saturation being unity 0.68 
Inches. 
Rained 9 days,—Max. fall of rain during 24 hours wee we BIG: 
Total amount of rain during the month, me ee SL 
Total amount of rain indicated by the Gauge attached to the anemo- 
meter during the month. : 37 
Prevailing direction of the Wind, a 8. &S8.S. W. & W. S. We 
