Meteorological Observatons. W\\\ 



Abstract of the Results of the Hourly Meteorological Observations 



taken at the Surveyor General's Office, Calcutta, 



in the month of July 1868. 



Monthly Results. 



Inches. 



Mean Lei glit of the Barometer for the month... ... ... 29.584 



Max. height of the Barometer occurred at 11 a. m. on the 7th. ... 29.723 



Min. height of the Barometer occurred at 5 p. m. on the 20th. ... 29.390 



Extreme range of the Barometer during the month ... ... 0.333 



Mean of the daily Max. Pressures ... ... ... ... 29.634 



Ditto ditto Min. ditto ... ... ... ' 29.527 



Mean daily range of the Barometer during the month ... ... o!l07 



Mean Dry Bulb Thermometer for the month ... 84.2 



Max. Temperature occurred at 2 & 3 p. m. on the 3rd. ... ... 93.4 



Min. Temperature occurred at 9 a. m. on the 10th. ... . . . ... 76^0 



Extreme range of the Temperature during the month ... ... 17.4 



Mean of the daily Max. Temperature ... ... . 88 7 



Ditto ditto Min. ditto, 



80.9 



Mean daily range of the Temperature during the month ... ... 7.& 



Mean Wet Bulb Thermometer for the month ... ... ... 81.0 



Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer 3.2 



Computed Mean Dew-point for the month ... ... ... 78.8 



Mean Dry Bulb Thermometer above computed mean Dew-point ... 5.4 



Inches. 



Mean Elastic force of Vapour for the month ... ... ... 0.964 



Troy grain. 

 Mean Weight of Vapour for the month ... ... ... iq.34 



Additional Weight of Vapour required for complete saturation ... 1.9a 

 Mean degree of humidity for the month, complete saturation being unity 0.85 



Inches. 

 Eained 23 days,— Max. fall of rain during 24 hours ... ... 3.47 



Total amount of rain during the month ... ... ... 11. If 



Total amount of rain indicated by the Gauge attached to the anemo- 

 meter during the month ... ... ... ... ... 9.19* 



Prevailing direction of the Wind... '.'.'. S. & S. S. W, 



* The amount of rain on the 26th could not be determined by the Ane- 

 mometer as the string connected with the gauge got loose after one discharge- 



