How much hotter is the ocean and air under this supposed vortex? But little hotter than they are on the side where the sun is not vertical, _and none on the other_. Let us be a little more particular. The temperature of the Atlantic under the belt of rains in our winter, and on the south of the belt at the latitude of 3 deg. south, and down to 9 deg. or more south, is 82 deg.. The air may range a degree, or possibly two, higher than the water at either point. On the north this difference is from nothing at the meeting of the trades and belt of rains, to about 4 deg. at their northern limit. This is too _trifling_ to be worth one moment's consideration. It is less, far less than the difference between the water and air of the Gulf Stream which runs along our coast, and the adjoining waters and air over them. While on the south side of the belt of rains the _difference is actually against the theory_--and the same state of things is reversed in summer, when the sun is vertical at the north. From the log of an intelligent shipmaster, found in the wind and current charts of Lieutenant Maury, I abridge the following, which will illustrate this. Captain Young in February, found the N. E. trades at about 17 deg. north latitude, with the water at 75 deg. and air at 76 deg., trade-wind N. E. At 12 deg. 16' the water was 75 deg. the air 76 deg. wind N. E. Feb. 22d. 9 deg. 49' " 76-1/2 deg. " 77 deg. " N. E. " 23d. 7 deg. 13' " 78 deg. " 78 deg. " N. E. " 24th. no obs. " 79-1/2 deg. " 79 deg. " N. E., E. S. E. rain. " 25th. 3 deg. 10' " 81 deg. " 83 deg. " E. S. E. rain. " 26th. no obs. " 82 deg. " 82 deg. " S. E. to E. S. E. hazy, rain & sqs. " 27th. 2 deg. 24' " 82 deg. " 82 deg. " calm, with rain. " 28th. no obs. " 82 deg. " 82 deg. " calm rain. March 1st. 0 deg. 29' " 82 deg. " 82 deg. " E. S. E. sqs. rain. " 2d. 1 deg. 27' S. L. " 82 deg. " 82 deg. " S. E. sqs. rain. " 3d. 2 deg. 44' " 82 deg. " 83 deg. " S. E. & S. S. E. weather settled. " 4th. 4 deg. 17' " 82 deg. " 83 deg. " S. S. E. & S. E. fair