Turning of the Wind. 107 



December, 1858 6*2 positive revolutions. 



January, 1859 4 - 8 „ ,, 



February, 1859 28 



These figures give for the single quarters the sums : — 



March to May, 1858 . . 15 - 5 positive revolutions. 

 June to August, 1858 . . 7 - 9 „ „ 



Sept. to Nov., 1858 . . 11-0 

 Dec, 1858, to Jan., 1859 13-8 „ 



giving a total sum of 48*2 complete revolutions in the sense 

 S., E.j N., W.j S., for the year, and an average of four revo- 

 lutions in the direct sense during the month. 



" Jumps " occurred on the following occasions, and under 

 the following circumstances : — 



Between S.E. by S. and N.W. by N. in the month of March. 



W. by S. and E. by N. 

 ,j S.E. and N.W. „ „ „ 



E.S.E. and W.N.W. 



S.E. by E. and N.W. by N. on April the 13th, 

 „ E.S.E. and W.N.W. on April the 20th. 



S.E. and N.W. on April the 29th. 

 jj S.E. and N.W. on May the 21st. 

 j j N.E. and S.W. on May the 25th. 



S.E. and N.W. on May the 26th. 



S.S.E. and N.N.W. on June the 23rd. 

 j, W. and E. on July the 4th. 

 j, N.E. and S.W. on August the 28th. 

 „ N.E. and S.W. on October the 6th. 



S.S.E. and N.N.W. on October the 23rd. 



N.W. by N. and S.E. by S. on October the 23rd. 

 „ E. by N. and W. by S. on October the 23rd. 



N.W. by W. and S.E. by E. on November the 11th. 

 „ W. and E. on December the 3rd. 

 „ N. and S. on December the 10th. 

 „ S. and N. on February the 1st. 



S.S.E. and N.N.W. on February the 2nd. 

 „ N. and S. on February the 6th. 

 „ S.S.E. and N.N.W. on February the 22nd. 



By examining the single instances of "jumps," we find 

 the following results. There were under twenty -four occur- 

 rences : — 



14 from the S.E. to the N.W. quadrant, or vice versa. 

 p 2 



