Tables IV. and V. give the principal minima and maxima of pressure observed; the values are reduced to the freezing-point and gravity at 45° latitude. The lowest pressure observed during our wintering was 711.74 mm. (28.022 inches), and the highest 772.14 mm. (30.400 inches), a range of 60.40 mm. (2.378 inches). Table VI. gives the monthly variations of the barometer, the mean value of which amounts to 34.30 mm. (1.350 inches), showing even more clearly than Table IV. that the cyclonic belt extends beyond the polar circle. From this table it appears, further, that the three months of almost continuous daylight (November, December, and January) are characterised by a very small variation of pressure--only 23.95 mm. (0.943 inch). The three corresponding months of winter have also a mean less than those for the intermediate or equinoctial months. Compare this with the mean pressures (Table III.). The differences between the annual and monthly means (Table VII.) show that February, March, and April form a negative group, in which the pressure is relatively low; the three months of polar night form another group of maximum barometric pressure; then follow August, September, and October, months of decreasing pressure, a group which, although not actually negative, forms a distinct secondary minimum; and lastly, three months of polar day forming a secondary maximum of pressure. The general result is illustrated in Fig. 1,--high pressure at the solstices, low pressure at the equinoxes,--and the existence of a direct simple relation between the barometric pressure and the progress of the sun is at once obvious. Table VIII. gives the observed wind directions: the figures indicate the number of hours during which the wind blew from each direction during the twelve months, the sums constituting the “wind-rose” of the point of observation. Fig. 2 shows that winds blow from northerly and southerly points with almost equal frequency, and that easterly winds predominate over westerly. The directions of greatest frequency were west, east, and north-east. [Illustration: FIG. 2.] The monthly wind-roses show some interesting seasonal variations in the prevailing directions of the wind; we note specially the predominance of north-east to south-east over westerly winds from November to February, and the relative frequency of westerly winds during June, July, and August (Fig. 3). The figures show that, on the whole, the station was beyond the westerly wind region, although at certain seasons the westerly system did extend as far south. [Illustration: FIG. 3.]