﻿ABSTRACT 



Meteorological Observations, McGill 



FOR THE 



College Observatory, 



MONTH OF DECEMBER, 1897. 



Montreal, Canada. Height above sea level, 187 feet, C. H. McLEOD, Superintmdent. 



Sunday 



Sunday.... 



MeanJ 



»3 Years ■ 

 for and incl 

 this month . 



THERMOMETER. 



BAROMETER. 



30.4410 

 30.5433 

 30 0565 



30 248 

 30.525 

 29- 583 

 30- 393 



30.237 

 30.153 

 30.181 

 30 181 

 30.126 

 29.862 



30-342 

 30. 3" r 

 '9.75' 

 29 958 

 30.187 

 30. 372 



30.498 

 29.899 

 29.901 



29 642 



30 3 '6 

 30-354 



30.448 

 30380 



-9 $'♦2 



20. 808 



30.146 

 30.153 

 29.856 

 29 585 



29.862 



"9-554 

 29 812 

 29.776 

 29-935 



29-778 

 30-335 

 29.714 

 29 458 

 29-6J4 



29.8751 



pressure [relative 



..283 

 .1598 



88. 



S.E. 



S E. 



S, 



S.W. 

 N.E. 

 S.W. 

 S.W. 

 S.W. 

 S.W. 







ANALYSIS OF WIND RECORD. 







Direction 



N. 



N.E. 



E. 



S E. 



S. : S.W. 



W. 



N.W. 



Calm. 



Mile. 



ti55 



400 



837 



.4>8 



1604 ; 5799 



205 



75 





Duration in hrs.. 



94 



33 



67 j 93 



107 1 327 



16 



7 





Mean velocity.... 



12.29 



.2.12 



12.49 j >5-35 



■4 99 1 '7-73 



12.81 



.0.71 





Greatest mileage in one hour was 



je Resultant mileage, 5CS2. 



24th. Resultant direction, S. 23i \V. 



Greatest velo city in gusts 54 miles per hour on ^(,[^1 mileage, 1) ,503. 



♦ Barometer readings reduced to sea-level and 

 temperature 32" Fahrenheit. 



§ Observed. 



t Pressure of vapour in inolies of mercury. 



t Humidity relative, .saturation being 100. 



1[ 16 years only. »n year.s only. 



The grealest heat w:is 47.7" on the lUh ; the 

 greatest cold wa^ —11.1=: on the 2.5th, giving a 

 range of temperature of 5S.8 degrees. 



Warmest day was the 10th. Coldest day was 

 the 2-lth. Highest barometer reading was 30.583 on 

 the 3rd. Lowest barometer was 29.330 on the 5th, 

 giving a range of 1.253 inches. Maximum relative 



.'i 



humidity was 100 on the 4th. 

 humidity was 62 nn the 25th. 



Rain fell on 6 days. 



Snow fell on 19 days. 



Rain or snow fell on 23 day 



Hoar FtosI on the 4th. 



Lunar halo on the 6th « 

 corona on the 2nd and 3rd. 



Bog on V day.". 



Minimum relative 



