46 



RESULTS OF METEOROLOGICAL OBSERVATIONS 



Expressed in percentage for each season, the relative numbers of occurrence of 

 rainy days for each of the eight principal directions was found as follows : — 



Table XV. — Showing the Dependence op Rain on the Direction of the Wind in 

 EACH Season and for the Year. 



Season. 



s. 



s. w. 



w. 



N. W. 



N. N. t. 



E. 



S. E. 



Spring . . . 

 Summer . . . 

 .Autumn. . . 

 Winter . . . 



3 

 5 

 3 



10 

 22 

 13 

 11 



1 



2 

 1 

 2 



4 

 3 



4 

 6 



3 

 3 

 5 



7 



37 

 21 

 41 



58 



15 



12 



12 



6 



27 

 32 

 21 



8 



Year (sum) . 



13 



56 



6 



17 



18 



157 



45 



88 



This table shows that it may rain (or snow) in each season with any one of the 

 eight winds ; that the greatest number of rainy days (or snowy days) on the average 

 during the year, and also for three seasons, occur with N. E. wind, and the least 

 number of rainy days, for each season and for the year occur with W. wind. The 

 wet and dry winds, therefore, blow from N. E. and W. respectively. The wet and 

 dry quarters of the compass are well exhibited by the annexed diagram for the 

 annual mean values. 



it) 6U 60 



The N. E. wind in winter is most constantly accompanied by rain (or snow) ; in 

 summer the S. E. wind surpasses the N. E. and S. W. in j)recipitation ; in winter, 

 however, the S. E. wind becomes indifferent. 



The position of the place of observation with respect to the ocean sufficiently 

 accounts for the characteristic shape of the graphical illustration. 



Thunderstorms. 

 Number and Distribution during the Tear. 

 The number of storms accompanied by lightning and thunder, recorded during 

 61 years, is 472, or nearly 9 a year. 



They are distributed over the several months as follows : — 



130 October ... 23 



107 November . . 8 



44 December . . 2 



January . 



1 



April . . 



. . 13 



July . . 



February . 







May . . 



. . 48 



August . 



March . . 



6 



June . . 



. . 90 



September 



