The large island known as Akpatok lies in such a position as to break much of the current along the south side of the middle of the strait, but to give additional force to the currents at either end. This island is about 100 miles long and has an average width of 18 miles. It is the largest island in the strait proper. The coast line of the northwest portion of the mainland is imperfectly known, as is the western coast forming the eastern shore of Hudson bay. Navigation in any portion of Hudson strait is attended with much danger, not alone from the tremendous energy of the tides but also from the quantity of ice to be found at all times. During the months of August and September the strait is comparatively free from large fields of ice, but after that date the harbors, coves, and other anchorages are apt to be frozen up in a single night. CLIMATE. The temperature is controlled by the direction of the wind. The warmest winds are southeast, south, and southwest during the summer. The northeast winds bring (if backing) fog, rain, or snow; the north wind is usually cold and disposed to disperse the clouds. The northwest wind is always very cold in winter and chilly in summer. Westerly winds are moderate in winter and summer. The southerly winds are warm at all seasons if blowing hard, but very cold if blowing lightly in winter. I think the coldest light winds of the winter are from a point little west of south. They are doubtless due to the cold from the elevated region--the Height of Land. The greatest amount of cloudiness occurs in the spring and fall; rather less in July and August, and least during December, January, and February. The average cloudiness for the entire year is not less than eighty-two hundredths of the visible sky. Sleet falls mostly from the middle of September to the beginning of December. Snow then succeeds it and continues to be the only form of precipitation until the middle of April, when sleet and snow fall until the first rain sets in. The season of rain is very erratic. It may rain by the first of May, but rarely does. Snow falls every month in the year; the 2d of July and the 6th of August were the dates farthest apart for this form of precipitation. The character of the rain is usually moderate to hard for the summer showers; although several notable exceptions of abundant dashes occur during late June and all of July. The August and September rains are usually light to moderate, but often persistent for several days. The snowfalls are light to heavy in character, rarely, however, lasting more than twenty-four hours. The sleet is usually precipitated in severe squalls. The lower grounds are permanently covered with snow by the 1st of December, this covering remaining until the 10th of June. At the latter date only the heavier drifts and the snow of the ravines remain. It entirely disappears by the last of July at all elevations no higher than that of Fort Chimo.