(No. 25a.)

Central Africa.
Gondokoro and vicinity, latitude 4° 55' north, longitude 30° 48' east.

Observed by Lady Baker, from August 1, 1871, to July 7, 1873, during tours extending from
0° to 5° north latitude, and 31° to 33° east longitude.

In reference to the part of Lake Albert N'Yanza, lying between 1 and 2 degrees north latitude, Sir Samuel Baker says (1864): “The lake was calm every day till i P. M., when a southwest gale arose, and compelled the canoes to be hauled ashore."

(No. 26.)

Speke's Station (near the source of the Nile), Africa.
Observations for 12 months in the years 1861 and 1862 show the following prevailing directions
of the winds in the different months of the year, viz. : January and February N. E., March E. by
N., April variable, May E. by S., June, July and August S. E., September and October variable,
November and December N. E.

(Nos. 27 to 32.)

Indian Ocean.
From observations for an aggregate period of over 8} 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.

are ding Ratio of resultant

29. Longitude

60° to 80° E.

...

...

...

...

..

30. Longitude

80° to 90° E.

...

...

...

Spring 12 24 35 7 9 4 14 5 12 19 47 35 30 27 25 19 4 N. 79° 31' W..29 S. 49o w..05 | 110

mmer 2 5 11 4 8 4 25 24 52 71 83 49 46 64 25 8 21 S. 50 12 w..53 S. 21 W.1.46 168 Autumn 10 5 10 3 1 1 2 2 6 13 43 12 25 12 31 15 0 N. 86 39 W..60 S. 811 W..38 64 Winter 3 21 63 13 8 5 1 0 3 0 0 5 7 11 1 15 3 N. 30 54 E. .61 N. 51 E. 1.72 33 The year!

N. 69 12 W..26

395 Spring 41 28 49 33 30 30 62 33 41 48 99 84 72 45 48 25 48 S. 57 28 W..19 S. 87 E. 1.09 272 Summer 0

0

0 3 7 20 28 47 93 77 33 24 12 5 8 S. 50 34 W..75 S. 43 W..48 119 Autumn 35 13 11 11 19 12 18 25 36 56 133 104 102 68 41 11 27 S. 67 35 W..50 S. 73 W..22 241 Winter 111 203 178 110 75 37 44 10 20 23 40 52 44 28 56 41 35 N. 30 24 E. .43 N. 44 E. 1.66 369 The year?

. S. 63 6 W.1.28

1007 (Spring 6 11 11 1 10 8 22 25 40 53 64 68 27 28 26 15 26 S. 47 56 W..46 S. 21 W..16 147

Summer 7 5 1 5 2 1 10 17 45 73 172 101 34 11 27 3 33 S. 47 58 W..46 S. 214 W..17
Autumn 10 6 2 10 6 10 19 16 15 42 94 51 48 30 24 8 17 S. 57 3 W..52 S. 49 W..20 136
Winter 38 38 52 26 21 6 10 5 6 13 31 11 35, 1947 17 34 N. 0 54 W..29 N. 32 E. 1.52 137
The year!

S. 61 13 W..32

603 r Spring 20 18 45 20 15 18 52 27 21 31 51 19 26 19 37 23 51 S 14 28 w..064 N. 76 w..06

165 Summer 8 18! 10 7 25 19 88 53 49 25 39 21 26 15 36 6 13 S. 7 55 E. .34 S. 1} W..26 153 Autumn 14 15 22 2 12 71 22 26 15 16 19 2 10 7 23 7 23 S. 31 56 E. 1.08 N. 24 W..01 81 Winter 40) 45 65 19 41 5 41 4 19 16 37 16 18 10 34 25! 46 N. 29 57 E. 1.21 N. 13 E. 1.26 161 The year!

S. 31 6 E. 1.09

560

183

31. Longitude

90° to 95° E.

U..

32. Longitude

95° to 105° E.

I Computed from the resultants for the seasons.

(No. 33.)

Singapore.*
Computed from observations made during the months of June and July, 1843, as follows:
North 2, N. E. 12, East 2, S. E. 54, South 37, S. W. 76, West 9, N. W. 29, Calm 1.
Direction of resultant S. 19° 27' W. (?)
Ratio of resultant to sum of winds .47.

(Nos. 34 to 41.) China Sea, Celebes Sea and Pacific Ocean.
From observations for an aggregate period of nearly seven 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.

57 41 142 33 61 39 67 13 89 37 54 13 27 3 31 3 38 S. 87° 50' E. .24 249

3 1 6 1 15 22 78 63 101 98 110 4 18 10 19 7 23 s. 4 38 W..62 193 56 56 61 17 50 17 70 43 194 93 144 30 106 22 73 15 45 S. 27 55 W..27 364 121 161 163 32 20 1 6 1 6 1 4 3 10 16 26 17. 2 N. 22 45 E. .77 197

S. 76 24 E. .09 1003 6 0 17 0 8 2 2 12 37 40 46 8 6 4 6 0 1 s. 22 39 W..55 65 23 7 15 12 18 5 12 1 6 914 2 11 4 6 6 3 N. 44 33 E. .18 51 15 1 11 25 7 13 12 7 21 10 26 6 10 0

2 12 s. 31 44 E. .22 60 109 16 83 7 22 2 15 6 14 4 17 15 23 11 43 56 7 N. 6 4 W. 1.49 150

N. 16 38 W. | .02 979

36. Celebes Sea, longitude 110° to 130° E.

...

...

...

Computed from the resultants for the seasons.

* Observations made at Raflle's Light show the following prevailing directions of the wind for the several months of the year, viz. : January N. E., February N. E., March N. E., April N. N. E., May S. S. W., June S., July S. S. W., August S. S. W., September S. W., October W. S. W., November N., December N. E.

Addendum to Zone 18.
Observations on the Indian Ocean, calculated at the Meteorological Institute of the Netherlands,
under Capt. Cornelissen's direction.

SOUTHERN HEMISPHERE.

ZONES 19 TO 36.

NOTE.-In classifying the winds of the Southern Hemisphere the months of March, April and
May have been designated Spring; June, July and August, Summer; September, October and
November, Autumn; and December, January and February, Winter. On the maps the same
notation and order have been preserved; the first season, Spring, being marked I; Summer, S;
Autumn, A ; and Winter, W.

ZONE No. 19.

LATITUDE 0° TO 5° SOUTH.

The data for the study of the winds of this zone consist of observations made at 4 regular stations on land, for an aggregate period of 24 years 7 months; at sea for about 73 years 3 months. The distribution is as follows:

(Nos. 1 to 19.) Pacific Ocean, east of longitude 180°
From observations for an aggregate period of nearly 31 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.

1. Longitude

175° W. to 180°.

North.
Por N. N. E.
O

7 23 69 36 35 9 4 3 9 13 7 59 31 136 23 80 4 11 7 5 17

5 31 11 65 27 22 90 52 74 62 61 15 90 4 10

Et Number of days.

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

...

2 0 6 3 N, 60°46' E. /.67 | N. 22°E. 24 0! 6 5 0 0 7 S. 88 22 E. .72 S. 641 E. .21 7

0 0 022 S. 53 54 E. .59 S. 7 W.1.41 0 18 14 51 20 37 N. 45 57 E. .43 | N. 43 W..31

N. 82 57 E..53 1 1 0 1 0 0 N. 67 45 E. .79 N. 10 E. 1.33 0

0 0 0 0 S. 62 1 E. .88 S. 15 E. 1.39 0 5 0 5 0 17 S. 69 36 E. /.71 S. 2 W..21 3 25 6 23 32 40 N. 66 44 E. | .56 N. 31 W..30

S. 86 59 E. 1.67

173 129

75 204 481

90 124 174 234 622

16 23 60 68 59 12 20 4 3 0
0 0 0 32 88 80 118 34 20
6 8 30 40 157, 52 111! 49 28 13
701 27 96 86 1771 49 54 8 6 4

2. Longitude

170° to 175° W.

...

| Computed from the resultants for the seasons.

...

819

126

37 147

.85

0
0 0
3 0

0 0 S. 85 9 E.?? .90 N. 62 E. 1.03

0 0 S. 77 39 E.?? .81 S. 42 W.1.11 0 0 0 S. 84 17 E. .91 S. 84 39 E..03

.87
.90 N. 71 E. 1.18

042 N. 85 36 E. .77 N. 11. E. .27 0

.89 s. 34° E. 1.17 ... ... S. 74 3 E. 0 12 S. 73 35 E. .88 N. 60 E. .16 0 0 S. 43 4 E. .92 s. 13 W..35 65 0 124 S. 77 2 E. N. 451 W..32 86 0 0 S. 73 4 E. N. 67 E. .18 187 .78

533 .83 | N. 24 W.1.07 134 0 S. 56 47 E.? .94 s. 5 E. 1.09 38 0

O E.? .95 s. 88 E. 1.06

.86 N. 20 W. .03 206

.89 0 32 S. 58 2 E..80 N. 83° W..09 0 0 S. 61 34 E. .92 S. 75 E.

1
0
0
5

2

...

0

0 0 0

zz1d

6

199 485

...

...

...

...

...

...

...

...

...