No. 3.] 



SMALL WOOD — METEOROLOGY. 



339 



The ice left the froat of the city on the 8th of April, and the 

 first steamer arrived in port on the 10th day. The last frost of 

 spring was on the 2Gth of April. 



Winds. — The most prevalent wind during the year was the 

 West, the next in frequency the N. E. The most windy month 

 in the year was May, and the least winuy month July. 



Below is a table showing the direction of the wind for each 

 month and its mean velocity in miles^ irrespective of its direction : 



Months. 



January , . 

 February.. 

 March. . , . 



April 



May 



June 



July 



August .. . 

 September 

 October . . 

 November 

 December 



Veloc'y 



4.82 

 5.77 

 2.86 

 5.04 

 6.89 

 1.84 

 1.84 

 4.55 

 4.34 

 4.07 

 3.84 

 4.84 



Mean monthly amount of clouds in decimals, a cloudy sky 

 being represented by a whole number (1.00.) 



There were 138 nights suitable for astronomical purposes dur- 

 ing the year. 



The aurora borealis was visible at observation hours on 26 

 nights, and exhibited some grand displays on the 10th and 11th 

 of February, 17th March, 9th of April, 7th of August, 7th of 

 September and the 9th of November. 



Montreal Observatory, 30th Jan., 1872. 



