the progressive increase of temperature from April to July, also, bore a strong analogy to the relative circumstances at Stockholm, I formed a scheme of decimals, connected with a simple formula, by which the same proportion of change, which has been observed to take place every month at Stockholm, may be made very readily to apply to any other country, whence, situations and circumstances being nearly similar, the temperature of unobserved months may be calculated. The temperature of January, latitude 78°, comes out—1°; that of February, O° 7′; March, 6° 1′; August, 34° 9′; September, 27° 8′; October, 18° 5′; November, 9° 8′; and December, 3° 1′. Following the example of every generalizing meteorologist, I may, with some propriety, extend my observations to the probable temperature of the north Pole, provided I can proceed on data, not merely arbitrary or fanciful, but founded on observation and analogy. It has been observed, that professor Mayer’s theory for ascertaining the temperature of every latitude, becomes exceedingly wide of the truth when we approach the regions of perpetual ice, notwithstanding in most other situations on the sea, or bordering thereon, it holds sufficiently near. According to it, the mean temperature of latitude 76° 45′, near the western coast of Spitzbergen, would have been 33° 8′, instead of 18° 8′, as shown by my observations; and, according to it, the mean temperature of the Pole is reckoned to be about 31°. The 15° difference between the observation and calculation must be considered as the frigorific effect of the ice, of which, if we can ascertain the probable measurement at the Pole, we shall be able to modify Mayer’s calculation, so as to approximate to the mean temperature. At the Pole, no wind could convey the mild influence of a temperate climate, because, from whatever direction it should blow, it must be cooled down by brushing over an extensive surface of ice; consequently, the full frigorific effect of the ice must be greater in the Pole than in places situated at or near the borders of the ice. In a total period of 242 days, the temperature of the air was, by observation, found to be more or less influenced by the ice during 173 days of that period. Hence, as 173 is to 15°, the anomaly occasioned by the mean temperature, so is 242 to 21°, which is the probable anomaly that may be expected when the temperature is always influenced by the ice, or the anomaly which may be supposed to occur at the Pole. Now, if we deduct 21° from 31°, the calculated temperature of the Pole, the actual mean temperature at the Pole will be about 10°. Concerning the pressure of the atmosphere in Polar latitudes, I would remark, particularly in the winter and spring months, it is liable to sudden and very considerable variations, and a careful study and observation of these is necessary to enable the watchful mariners to anticipate the approach of storms.