weather. " 5th. 6 deg. 08' " 82 deg. " 84 deg. " S. E. fair wthr. " 6th. 8 deg. 08' " 82 deg. " 84 deg. " S. E. & E. S. E. fair weather. Here the air was seven degrees colder at the extreme limit of the N. E. trades than in the _center_ of the belt of rains, as it is, usually, in mid-winter, but not in summer. On the other hand, _after he left the region of calms and rains_, where the water and air stood with almost entire uniformity at 82 deg., on the 3d of March, and for three days thereafter, during which he was in the S. E. trades with fair weather, the water was the same as under the supposed vortex, _viz._, 82 deg., _and the air rose to 83 deg. and 84 deg._! _This is demonstration._ I also take from a letter of Lieutenant Walsh to Lieutenant Maury, relative to the cruise of the "Taney" the following, showing the warmth of the Gulf Stream compared with the adjacent ocean. "We first crossed the Gulf Stream on the 31st of October; we struck it in latitude 37 deg. 22', longitude 71 deg. 26' as indicated by the temperature of the water, which was as follows: 8 A.M. water at surface 66 deg. 9 " " " 73 deg. 10 " " " 76 deg. 11 " " " 77 deg. 77 deg. was the highest temperature found in crossing at this time. Re-crossing it in May, in latitude 35 deg. 30', longitude 72 deg. 35', he found the water as follows: 8 A.M. water at surface 71 deg. 8' 9 " " " 73 deg. 10 " " " 75 deg. 5' 11 " " " 78 deg. 5' 12 M. " " 78 deg. 5' 79 deg. being the highest temperature found." The average difference between the temperature of the water of the Gulf Stream and the adjoining ocean, at the line of division, is about ten degrees, increasing to more than twenty on approaching the coast, and within one hundred miles--a far greater difference than is ever found on the winter side of the inter-tropical rainy belt.