38 



H. C. DANNEVIG, 



From this it will be seen that the " reds " contain all winds 

 blowing across the drift direction from west and north, 

 while the "greens" contain those crossing from east and 

 south. The individual months might now be considered — 

 April and October show each about an equal quantity of 

 red and green and have three primary winds — west, north- 

 east, and south; in all these points the two months resemble 

 the year, and have been placed on the dividing line — the 

 central zone. From November to March the winds blow 

 from north-east, east, and south, with a maximum of energy 

 about January (midsummer); from May to September the 

 blow is mainly from the west, with a maximum intensity 

 about July (midwinter). It will be seen that the summer 

 and winter are of equal duration (five months each) and 

 they carry about the same mileage of wind. 



Table VIE1. — Showing the resultant wind-directions 

 for each month and extent in miles (Normals). 



Month. 



Direction. 



Miles. 



Seasons. 





East 







October ... 



N. 307-50 



390 



Autumn 



November 



„ 28400 



2100 



\ 



December 



„ 281-00 



2900 





January... 



„ 281-00 



3050 



[• Summer 



February 



„ 281-75 



2780 



J 



March . . . 



,. 291-25 



2185 



April 



,, 30-50 



875 



Spring 



May 



„ 67-75 



2325 



\ 



June 



„ 86-25 



3760 





July ... 



„ 79-50 



3825 



-Winter 



August ... 



„ 77-75 



2735 





September 



„ 84-50 



1325 



i 

 Tear 



Resultant 



„ 11'75 



6700 



Having ascertained the normal features of the atmos- 

 pheric movement for each month and for the year, it became 

 necessary to find out to what extent individual years 

 have differed from the mean. The object hereof was to 

 discover whether periodic fluctuations do exist, and if so, to 

 compare these with the gradual yearly increase and decrease 

 in the abundance of fish — the assumed connection between 



