ABSTRACT FOR THE MONTH OF DECEMBER, 1889. 



Meteorological Observations, McGill College Observatory, Montreal, Canada, Height above sea level, 187 feet. C. H. McLEOD, Superintendent. 



THERMOMETER. 



. Max. Mid. 



•BAROMETER. 



29.9258 

 30- 2937 

 30.5160 

 30 0587 

 29.9488 

 29 86S2 



30.261S 

 30. 1420 

 29.S507 

 29.7427 



30.258 

 29.882 

 29 909 



. :..: 



velocity 

 perhour 



ANALYSIS OF WIND RECORD. 



Duration in hrs. 

 Mean velocity.. 



Greatest mileage in one hour was 7° on the 30th. 



Greatest velocity in gusts 150 miles per hour for 

 vo miles on the 30th. (This is the greatest velocity 

 n our records.) 



Resultant mileage, 5)630. 

 Resultant direction, West. 

 Total mileage, 13,534. 



•Barometer readings reduced to sea-levol and 

 temperature of 32 Fahr. 

 § Observed. 



t Pressure of vapour in inches of mercury, 

 t Humidity relative, saturation being 100. 

 IT Eight years only. 



The greatest heat was 45 - 7 on the 9th mid 30th ; the 

 greatest cold was 7.1 below zero on the 4th, giving 



range ot temperature of 52. 8 degrees. Wannest 

 u ay was the 9th. Coldest day was the 4th. Highest 

 barometer reading was 30.S89 on the 31st; lowest 



barometer was 29.036 on the 26th, giving a range of 

 853 inches. Maximum relative humidity wb 

 1 the 20th. Minimum relative humidity was 



Rain fell c 



Snow fell on 



Rain and sm 

 An Aurora v 

 Hoar frost oi 



Lmi 



rhalo 



i days. 



'ell on 32 days. 

 j fell on 3 days. 

 s observed on 1 1 



one night. 



