(No. 27.)

Orange Bay and vicinity, Terra del Fuego.
Computed from observations made hourly, under the direction of Commodore Wilkes, from Feb-
ruary 18th, to April 20th, 1839, together with those for threc days, collected and classified at the
United States Naval Observatory, as follows:-

Spring. - North 46, N. E. 61, East 9, S. E. 21, South 17, S. W. 678, West 120, N. W. 84,
N. N. W. 12; calm 194.

Direction of resultant S. 59° 29' W.?
Ratio of resultant to sum of winds .56.
Number of days 54.
Winter. - North 9, N. E. 16, East 10, S. W. 156, West 7, N. W. 11; calm 55.
Direction of resultant S. 51° 36' W.??
Ratio of resultant to sum of winds .50.
Number of days 11.

(No. 28.) Saint Martin's Cove and vicinity, Terra del Fuego.
Computed from observations collected and classified at the United States Naval Observatory, for
an aggregate period of 36 days, combined with those made by Charles Darwin, for 7 days, in the
winter of 1832, and those made by Sir James Ross, for 71 days, in the autumns of 1842 and 1843,
as follows:-

Autumn.-North 3, N. E. 3, E. N. E. 8, East 2, S. E. 1, South 2, S. S. W. 9, S. W. 69,
W. S. W. 11, West 18, W. N. W. 8, N. W. 11, N. N. W. 10; calm 12.

Direction of resultant S. 67° 41' W.?
Ratio of resultant to sum of winds .57.
Number of days 95.

Winter.-N. N. E. 1, N. E. 2, South 4, S. S. W. 3, S. W. 2, W. S. W. 4, West 2, W. N. W. 3,
N. W. 1.

Direction of resultant S. 60° 59' W.?
Ratio of resultant to sum of winds .52.
Number of days 19.

(Nos. 29 to 46.) Antarctic Ocean, longitude 73° west, eastwardly to 180°.
From observations for an aggregate period of over 5 years, collected and classified, from the
logs of numerous sailing vessels, at the United States Naval Observatory, under the direction of
Capt. M. F. Maury, Superintendent.

13 46 4 12

7 7 0 8 15 31 13 17 20 53 131 21

29. Lat. 589 to 60° S., long. 610 to 73° W.

30. Lat. 56o to 58° S., long. 65° to 67° W.

31. Lat. 56° to 58° S., long. 630 to 65° W.

32. Lat. 56° to 58° S., long. 610 to 63° W.

Spring
Summer
Autumn
Winter
The year'
Spring
Summer
Autumn
Winter
The year!

9 44 28 119 62 69 51 51 14 N. 84 12 W..54 S. 24° W..10 | 179 8 20 13 25 14 36 10 19 1 N. 89 14 W. .44 S. 22} E. .15 61 2 13 11 50 41 93 49 59 11 N. 55 25 W. .57 N. 91 E. .18 139 8 35 40 117 93 172 48 68 28 N. 72 34 W. .57 N. 661 W. .05 244 N. 73 19 W.' .52

623 5 22 22 66 31 56 22 43 14 N. 81 11 W. .50 S. 54 E. .02 113 71 21 12 29 20 14 7 23 2 S. 82 12 W. .40 S. 73 E. .12 60 1 10 11 53 38 69 19 35 11 N. 74 14 W. .67 N. 54 W..16 92 425 20 87 74 101 19 40 24 N. 73 35 W. .54 N. 4 W. .07 163 N, 80 7 W. .52

428

5 18 7
12 8 1 1
11 9 2 1
26 27 10 20

The data for the study of the winds of this zone consist of observations made on the Antarctic Ocean for an aggregate period of 505 days.

(Nos. 1 to 12.)

Antarctic Ocean.
Observed for an aggregate period of 505 days, as described in the following table and notes
appended :-

...

... ...

67

1. Lat. 60° to 65° S.,

Winter! 3 0 1 1 0 0 0 0 0 0 1 0 3 0 0 0 0 N. 31° 36' W..44 long. 150° to 175o W.

1 2. Lat. 62° to 65° S.,

Winter! 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 S. 45 0 E. .71 long. 133° to 135o W.

1 3. Lat. 60° to 64° S.,

Winter? 4 0 0 0 0 0 0 0 3 0 0 0 5 0 0 0 3 N. 78 41 W. .34 long. 84° to 117° W.

r Spring 2 1 2 11 0 0 0 0 1 2 6 4 18 322 o N. 38 24 w..59
Summer2 | 2 1 05, 0

0 0 0 0 0 0 0 0 1 N. 38 47 E. 1.82 4. Lat. 60° to 629 S.,

Autumn 3 0 0 0 2 0 0 0 3 4 2 14 8 8 0 N. 56 35 W.1.75 long. 63° to 83° W.

Winter2

0 0 3 0 0 0 0 0 1 0 9 14 11 12 1 N. 48 3 W.1.76 The year

N. 27 31 W..57 5. Lat. 60° to 65° S.,

Winter3 10 412 417 2 12 8 15 10 17 0 4 6 6 1 6 S. 33 19 E. long. 5° to 50° W.

.193 6. Lat. 60° to 65° S.,

Spring3 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 S. 11 3 W.1.86 long. 11° to 14° W. 7. Lat. 60° to 61° S.,

Winter 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 s. 22 30 E. .92 long. 12° to 14° E. 8. Lat. 60° to 65° S.,

Winter 11 0.0 0 1 0 0 0 4 0 0 0 1 0 1 0 0 S. 17 13 W..30 long. 28° to 47° E. 9. Lat. 60° to 61° S.,

Spring 0 0 1 0 1 0 0 0 0 0 0 0 2 0 0 0 0 N. 22 30 W..15.) loug. 107° to 1180 E. 10. Lat. 60° to 65° S.,

Winters 0 0 0 0 48 1 22 40'59 22 13 15 41 23 24 0,4 S. 953 W..391 long. 95° to 115° E. 11. Lat. 60° to 65° S.,

Winter 0 0 0 0 33 20 19 14 15 0 1 5 2 5 4 0 2 s. 49 49 E. .61 long. 130° to 135° E. 12. Lat. 60° to 65° S.,

Winter? 110 00 10 20 10 30 0 0 0 29 6 69 12 32 36 0 N. 72 17 W..33 long. 160° to 176° E.

I Computed from observations made by Captain Cook, in the winter of 1773-4.

2 Computed from observations collected and classified at the United States Naval Observatory, under direction of Captain M. F. Maury.

3 Computed from observations made by Sir James Ross, in the winter and spring of 1842-3. 1 Computed from observations made by Captain Cook, in the year 1773.

5 Computed from observations made by Captain Cook, for 5 days, in 1773, together with those made hourly, under the direction of Commodore Wilkes, for 8 days, in February, 1840.

6 Computed from hourly observations made under the direction of Commodore Wilkes, for 5 days, in February, 1840.

1 Computed from observations made by Sir James Ross, for 12 days, in 1842 or 1813, combined with those made hourly by Commodore Wilkes, for 6 days, in 1839 or 1840.

ZONE No. 32,

LATITUDE 65° TO 70° SOUTH.
The material for this zone is derived from the observations of the Antarctic ex-
plorers, Cook, James Ross and Wilkes, for an aggregate period of 104 days.

1. Lat. 65° to 70° S., long. 135° to 150 W. Winter? 2. Lat. 65 to 70 S., long. 100 to 110 W. Winter? 3. Lat. 65 to 70 S., long. to 20 W. Spring2 4. Lat. 67 15' S., long. 39 35' E. Winter3 5. Lat. 65 to 67 S., long. 105 to 160 E. Winter 6. Lat. 65 to 70 S., long. 166 to 176 E. Winters

1 1 2 0 0 0 0 0

0 0 1 0 0 N. 15° 6' E.??? .84 0 3 1 2 0 0 2 0 0 0 0 0 0 0 0 N. 72 4 E.??? 1.76 0 0 0 4 0 2 2 2 1 0 0 0 0 2 0 0 S. 57 47 E.??? .37

S, 78 45 E.??? 1.00 8 0 7 7 25 69 89 26 68 24 63 43 54 711 10 17 S. 5 45 E.? .41 10 3 10 5 6 13 7 4 13 212 9 93 8 4 2 S. 5 37 E. .07

5 9 7 1 22 60

i Computed from observations made by Captain Cook, in the year 1770. 2 Computed from observations made by Sir James Ross, in the year 1842. 3 Captain Cook was at this point January 17th, 1773, and found the wind E. S. E. 4 Computed from observations made under the direction of Commodore Wilkes, along the coast of the Antarctic Continent, in the

year 1840.

6 Computed from observations made by Sir James Ross, in the winter of 1842–3.

ZONE No. 33.

LATITUDE 70° TO 75° SOUTH.

The material for the study of the winds of this zone is derived from the observations of the Antarctic explorers, Captain Cook and Sir James Ross, for an aggregate 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 1773–4, 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. 550 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.

ZONE No. 34.

LATITUDE 75° TO 80° SOUTH.

Sir James Ross appears to be the only explorer who ever penetrated this zone, and the material 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 166o 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.

ZONES Nos. 35 and 36.

LATITUDE 80° TO 90° Soutu.

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 the 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.