The pleasant climate of Devonshire, which is highly conducive to health and to extreme longevity, and which, especially in the south, favours luxuriant and even sub-tropical vegetation, owes its character to five main causes;--the fact that the county is bounded on two sides by the sea; the influence of the Gulf Stream or warm ocean current, which directly affects both coasts; the warmth and moisture of the prevailing winds; the shelter afforded to the southern districts by the high ground of Dartmoor; and the large amount of bright sunshine which the county, and especially the south of it, is favoured. It is owing to the Gulf Stream that the temperature of the sea in the English Channel is many degrees higher in winter, even as far east as the Goodwins, than that in the North Sea. Thus, the east wind, blowing over 200 miles of warmed water, has, by the time it reaches Devonshire, lost much of its proverbial bitterness. On the other hand it is mainly owing to the influence of the Gulf Stream that the climate of Ilfracombe is more equable than that of any other town in England except Falmouth, and is, in fact, from half a degree to a degree warmer in winter and cooler in summer than Torquay itself. [Illustration: Upcott Lane, Bideford] It is largely the shelter given to it by Dartmoor and the Blackdown Hills that makes the south and south-east of Devonshire so famous for its warm and pleasant climate. The south-west also benefits from the protection afforded by the spurs of Dartmoor, but the rainfall of that district is heavier and the air more relaxing. The prevailing winds in Devonshire are the west and south-west, which, blowing across the open Atlantic, are also the chief rain-carrying winds. Both are comparatively warm, the latter following the course of the Gulf Stream. But they are often violent, and vegetation fully exposed to them does not flourish. The peninsula of which Devonshire forms a part contains the warmest districts in Great Britain. The annual average temperature of the whole county is 49-1/2° Fahr., which is a degree and a half higher than that of the whole of England; while the average for Torquay is 51°. In the three winter months, January, February, and March, in which the average temperature for London is 39·7°, that for Torquay is 41·3°. The annual amount of bright sunshine in Devonshire naturally varies in different years. In 1906 it was nearly 2000 hours on the south coast, and not less than 1800 on the north. The average amount appears, however, to be about 1700 in the south, and 1500 on the north coast, or between three and four hours a day. The actual amount would, of course, be much more than this in summer, and much less in the winter.