"Thursday, January 18th. The wind that began yesterday has gone on blowing all to-day with a velocity of 16 to 19 feet per second, from S.S.E., S.E., and E.S.E. It has no doubt helped us on a good way north; but it seems to be going down; now, about midnight, it has sunk to 4 metres; and the barometer, which has been rising all the time, has suddenly begun to fall; let us hope that it is not a cyclone passing over us, bringing northerly wind. It is curious that there is almost always a rise of the thermometer with these stronger winds; to-day it rose to 13° Fahr. below zero (-25° C). A south wind of less velocity generally lowers the temperature, and a moderate north wind raises it. Payer's explanation of this raising of the temperature by strong winds is that the wind is warmed by passing over large openings in the ice. This can hardly be correct, at any rate in our case, for we have few or no openings. I am rather inclined to believe that the rise is produced by air from higher strata being brought down to the surface of the earth. It is certain that the higher air is warmer than the lower, which comes into contact with snow and ice surfaces cooled by radiation. Our observations go to prove that such is the case. Add to this that the air in its fall is heated by the rising pressure. A strong wind, even if it does not come from the higher strata of the atmosphere, must necessarily make some confusion in the mutual position of the various strata, mixing the higher with those below them, and vice versa.