+-------------------------------------------------------+ | 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 deg. and 25 deg. north latitude, and 15 deg. and 45 deg. 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 | +-------------------------------------------------------+ Ascending once more, to the region between the degrees of 25 and 30, north latitude, and 15 and 45, west longitude, we find it bounded east entirely on the center of the desert. Now here, certainly, there must be evidence of the truth of the rarefaction theory, if any where on the face of the earth. Yet here, in July and August, we find the trades as regular as any where, and not more variable winds than are found in the trades toward their northern limits every where, and in August, only forty out of four hundred and twenty-nine winds, blowing directly or indirectly on shore.