Here, it is evident that the S. E. trades are the prevailing winds, but their course is variable.
Ascending to the region between 5° and 10° north latitude, and 10° to 55° west longitude, the northern part of which at this season is covered by the rainy belt; we find the monsoon, the S., S. S. W., and S. W. winds, the prevailing ones in August, although the winds are variable, as usual under the rainy belt.
| Course. | July. | August. | Course. | July. | August. |
| North. | 19 | 6 | S. S. W. | 188 | 368 |
| N. N. E. | 26 | 11 | S. W. | 63 | 94 |
| N. E. | 194 | 32 | W. S. W. | 73 | 93 |
| E. N. E. | 30 | 16 | West. | 33 | 48 |
| East. | 45 | 29 | W. N. W. | 30 | 18 |
| E. S. E. | 36 | 40 | N. W. | 21 | 9 |
| S. E. | 93 | 53 | N. N. W. | 17 | 13 |
| S. S. E. | 225 | 307 | Calm. | 109 | 74 |
| South. | 239 | 514 | Total | 1,351 | 1,725 |
Ascending to the region of 10° to 15° north latitude, and 15° to 45° west longitude, we find the winds exceedingly variable, and the monsoons diminished remarkably. If Professor Coffin’s theory was correct, they should increase as they approach the desert; but they in fact, diminish, and the N. E. trades are found at the north portion.
| Course. | July. | August. | Course. | July. | August. |
| North. | 17 | 55 | S. S. W. | 30 | 71 |
| N. N. E. | 64 | 74 | S. W. | 33 | 63 |
| N. E. | 155 | 149 | W. S. W. | 19 | 43 |
| E. N. E. | 91 | 71 | West. | 12 | 25 |
| East. | 83 | 60 | W. N. W. | 17 | 21 |
| E. S. E. | 25 | 26 | N. W. | 13 | 24 |
| S. E. | 17 | 26 | N. N. W. | 24 | 56 |
| S. S. E. | 13 | 33 | Calm. | 62 | 78 |
| South. | 9 | 44 | Total | 684 | 919 |
Ascending to the region between 15° and 20° north latitude, and 15° to 45° west longitude, we get north of the belt of rains and lose the monsoons entirely although still below the desert; and find the regular N. E. trades, with less variable winds than are found in almost any other part of the ocean.
| Course. | July. | August. | Course. | July. | August. |
| North. | 39 | 20 | S. S. W. | 0 | 5 |
| N. N. E. | 210 | 185 | S. W. | 0 | 5 |
| N. E. | 112 | 87 | W. S. W. | 8 | 3 |
| E. N. E. | 114 | 104 | West. | 0 | 1 |
| East. | 20 | 36 | W. N. W. | 0 | 4 |
| E. S. E. | 21 | 17 | N. W. | 3 | 4 |
| S. E. | 0 | 2 | N. N. W. | 3 | 31 |
| S. S. E. | 2 | 11 | Calm. | 20 | 8 |
| South. | 5 | 1 | Total | 557 | 526 |
Ascending still further to the region between 20° and 25° north latitude, and 15° and 45° west longitude, which borders, in part, on the S. W. corner of the desert, and we have not, during the month of August, a single wind between S. S. E. and W. N. W., which blows in upon the land; and only twelve instances out of three hundred and ninety-four in this hottest month in the year, and on the southern portion of the desert, when the wind blows on shore from any quarter. This is demonstration. The monsoon winds are confined to the rainy belt; they do not reach the desert, nor does the desert attract the winds from the ocean, or reverse, hold back, or disturb the trades.
| Course. | July. | August. | Course. | July. | August. |
| North. | 25 | 20 | S. S. W. | 3 | 0 |
| N. N. E. | 210 | 153 | S. W. | 2 | 0 |
| N. E. | 129 | 77 | W. S. W. | 13 | 0 |
| E. N. E. | 110 | 86 | West. | 0 | 0 |
| East. | 8 | 20 | W. N. W. | 0 | 3 |
| E. S. E. | 4 | 11 | N. W. | 2 | 1 |
| S. E. | 0 | 3 | N. N. W. | 5 | 8 |
| S. S. E. | 1 | 7 | Calm. | 2 | 5 |
| South. | 1 | 0 | Total | 515 | 394 |