128 



side of the compass be added together, it will be seen that 

 the sum of the degrees on the East side is 1080, whilst the 

 sum of the West side is 1300, showing a ratio of excess of 

 the West side over the East of 1-2. But if the degrees for 

 each of the 8 points on the East side be added to the degrees 

 of each of the 8 points on the West side the following result 



appears : — 



^ . , »,, f N NNE NE ENE E ESE SE SSE 



Points of the compass j^ g gg^ g^ ^g^ -^ WNW NW NNW 



Number of degrees ) 



tlirougli which the V 230 257 309 343 391 314 306 230 

 wind veered ) 



The maximum of these numbers of degrees is found in 

 the East and West, both severally and conjointly, and the 

 minimum in the same way in the SSE and NNW. This 

 seems to show that the equatorial currents take a much 

 wider sweep over the earth than the polar currents do, or 

 rather that their oscillatory waves are more extensive. 

 I have, below, reduced the number of degrees through 

 which the wind has veered to the four cardinal points, and 

 they appear as follows : — 



Cardinal points N E S W 



Number of degrees ") 



through which the > 526 578 583 692 

 wind has veered ... ) 



This shows that the oscillation increases in the direction 

 of the sun's course, and attains its maximum at the West 

 point, or rather between the South and the West, thus that 

 the maximum of wind frequency is similar in position to its 

 maximum of oscillation. 



The following table represents the ratio of the advance 

 which the veering of the wind made with the sun's course, 

 against its retrogression for each of the given 16 points of 



the compass : — 



Points of the compass... N NNE NE ENE E ESE SE SSE 



Eatio of advance with ") -^.^^ g-gS 3-46 2-53 2-06 2-00 104 3-25 



the sun 8 course ... ) 

 Points of the compass... S SSW SW WSW W WNW NW NNW 



Eatio of advance with I Q.g. ^^Q ^.^g ^.^g ^.^g ^ qq ^.^g ^.^q 

 the sun s course ... ) 



