ABSTRACT FOR THE MONTH OF DECEMBER, 1898. 



Meteorological Observations, McGill College Observatory, Montreal, Canada. Height above sea level, 1S7 feet, C. H. McLEOD, Superintendent. 



THERMOMETER. 



BAROMETER. 



29.6432 

 29.9885 

 30.2570 



29.3093 

 29.7432 

 29.7343 



30 49 j8 

 30.3S4S 

 29 9991 



29.8245 

 =9.6390 

 29.9632 



29.7723 



30.157 

 30.274 



29'.8i5 

 30.222 



30.286 



29 977 



30.246 

 30.292 



30 53> 

 30.480 



30 456 

 30 219 



29 934 

 29.897 

 30.079 



30 319 

 29.780 

 30.087 

 30.074 

 30.077 



29 178 

 »9 3J. 

 29.059 



29.328 

 29 393 

 29.718 



s.w. 



21.87 



s.w. 



23.46 



s.w. 





s.w. 





s.w. 



26.33 



w. 





N. 





s.w. 





S.W. 



.8.13 



moQth. 



ANALYSIS OF WIND RECORD. 



Mean vclociu 



N, 

 2278 

 170 



N.E. 



E. 



S.K. 



S. 



S.W. 



w. 



N.W. 



Calm. 



—^ 



345 



527 



.218 1 7552 



1232 



421 





32 



37 



70 1 3'5 



69 



30 





13.40 



■ 1.00 



.0.78 



14.24 



17.40 23.24 



■7.8s 



14.03 





Qrentest mileage 

 5th. 



Qroateat velc 

 Iha 5th and 23rd. 



)ur was 51, on the Resultant mileage, 7i20. 



Resultant direction, S. 542" 

 Qroateat velocity in gusta 60 miles per hour on Total mileage, 13,694. 



• Barometer readings reduced to sea-level and 

 temperature 32° Fahrenheit. 



§ Observed. 



t Pressure of vapour in inches of mercury. 



I Humidity relative, saturation being 100. 



% 17 years only, a 12 years only. 



The greatest heat was 41.*9on the 30th; the 

 greatest cold vroA — ll-^O on the i4th, giving a 

 range of temperature of 52.9 degrees. 



■\Varmest day was the 22nd Coldest day. was 

 the 13th. Highest barometer reading was 30. .579 on 

 the Slst. Lowest barometer was 29.17S on the 5th, 

 giving a range of l"40l inches. Maximum rela- 



tive humidity waa 99 on the 6th, 20th and 2lBt. 

 Minimum relative humidity was 61 on the 24th. 



Rain fell on 5 days. 



Snow fell on 22 days. 



Rain or snow fell on 26 days. 



Lunar halo on 1 night. Lunar corona on 

 nights. 



