no. 4.] meteorological results. 



Meteorological Results for the Year 1881, 



255 



McGill Collejjfc Observatory, Montreal, Canada. C. H. McLeod, 

 Superintendent, Height above j^ea level, 187 feet. 



Month. 



Wind. 



Mean velocity 

 in mile.« ^ hour 



January. . . 

 February . . 



March 



April 



May 



June . . . 



July 



August . ... 

 September. 

 Octitber . . 

 November. 

 De-ember.. 



12 64 



n.6:» 



12. 84 



J 2 63 



10 6.5 



9.27 



8.06 



9.01 



9. 35 



10.97 



12 97 



13. 58 



Meiui.^for 1881. 



11.138 



Means for 7 years, ending with 

 1881 



n.(J8'J 



Mean, 

 direction. 



Sky clouded 

 per cent. 



S. W . by W . 



S. W. 

 N. W. l,v\V. 



N. W. 



N E by N. 



W . 



W. 



VV. 



s. 



s. s. w. 



s. w. 



S. W. I,y W. 



.^■7.9 

 ('-2.1 

 75.2 

 44 9 

 60.4 

 (■,0 7 



58. 

 57.1 

 61 4 

 (55.1 

 74.1 



73. 1 



W. S. VV 



('2 52 



6 .09 



* Barometer reduced to 32° Fah. and to sea level. 

 t Inches of mercury. 

 t Relative sjituriition being 100. 



The monthly means are derived from observations taken every fourth 

 hour beginning with 3.13 a.m. 



The greatest heat was 93.9, on the 10th July; ureatest cold 

 was 16.4° below zero on the 2nd of February ; extreme range of 

 temperature for the year, 110.3° ; greatest range of thermonjeter 

 in one day was 41.6° on tlie 11th of January ; the warmest day- 

 was July 10th, the mean temperature being 82.8° ; the coldest 



