SERIES B. ZONES 33 TO 36. L A T. 10° TO 90° S. 635 



ZONE IVo. S3. 



Latitude 70° to 75° South. 



The material for the study of the winds of this zone is derived from the obser- 

 vations of the Antarctic explorers, Captain Cook and Sir James Ross, for an ag- 

 gregate period of 41 days. 



(No. 1.) Antarctic Ocean, longitude 106° to 108° west. 



Computed from observations made by Captain Cook, for two days, in the winter of 1713-4, as 

 follows : — 



North 1, East 1. 



Direction of resultant N. 45° E.??? 



Ratio of resultant to sum of winds .71. 



(No. 2.) Antarctic Ocean, longitude 15° to 18° west. 



Computed from observations made by Sir James Ross, for four days, in the spring of 1841, as 

 follows : — 



N. E. 3, East 1. 



Direction of resultant N. 55° 48' E.??? 



Ratio of resultant to sum of winds .94. 



(No. 3.) Antarctic Ocean, longitude 166° to 176° east. 



Computed from observations made by Sir James Ross, for 35 days, in the winter of 1840-41, as 

 follows : — • 



North 3, N. E. 4, E. N. E. 2, East 9, E. S. E. 4, S. E. 14, S. S. E. 4, South 4, S. S. W. 1, S. W. 4, 

 W. S. W. 6, West 4, W. N. W. 2, N. W. 2, N. N. W. 1 ; calm 4 



Direction of resultant S. 38° 42' E.? 



Ratio of resultant to sum of winds .29. 



ZOIVE No, 84. 



Latitude 75° to 80° South. 



Sir James Ross appears to be the only explorer who ever penetrated this zone, and the materia! 

 for the study of its winds is therefore confined to his observations, which were made for a period 

 of 34 days, in the winter of 1840-1, between the meridians of longitude 166° and 168° east from 

 Greenwich, as follows : — 



North 2, N. N. E. 6, N. E. 9, E. N. E. 2, East 13, E. S. E. 4, S. E. 6, S. S. E. 4, South 3, 

 S. S. W. 2, S. W. 6, W. S. W. 2, West 1, N. W. 6 ; calm 2. 



Direction of resultant N. 88° 41' E. 



Ratio of resultant to sum of winds .31. 



Z0:NE8 ]\os. 35 and 36. 



Latitude 80° to 90° South. 



These zones have never been visited by man, and the character of the winds that blow over them 

 is very much a- matter of conjecture. From the analogy of tlie northern hemisphere, as well as 

 from theory, we may suppose that they blow from some southerly point, and become more easterly 

 as they advance. And this view is confirmed by the fact shown above that every computed resultant 

 south of latitude 65° is easterly. 



