[Frost and fire : natural engines, tool-marks and chips : with sketches taken at home and abroad by a traveller] . d sea when moving from smaller to larger circles. Butthe polar wind does not blow furiously, because air is draggedround and gains easterly motion as it gathers heat and losesweight on its way to the equator. For a like reason, an equatorial calm, which sets off alonga meridian, and blows from large to small circles, becomes awesterly wmd. It plays the part of the railway train, andovertakes the crawling tree which grows on the British bends trees, but does not always tea
[Frost and fire : natural engines, tool-marks and chips : with sketches taken at home and abroad by a traveller] . d sea when moving from smaller to larger circles. Butthe polar wind does not blow furiously, because air is draggedround and gains easterly motion as it gathers heat and losesweight on its way to the equator. For a like reason, an equatorial calm, which sets off alonga meridian, and blows from large to small circles, becomes awesterly wmd. It plays the part of the railway train, andovertakes the crawling tree which grows on the British bends trees, but does not always tear them up by the roots,because it is held back by friction. The warm light equatorial south wind blows because airexpands, and loses weight, and rises ; it becomes a south-westwind because the earth turns eastwards. The prevailing direction of the wind in the British Isles isabout south-west, and trees proclaim the fact by form. In Wistmans Wood, near Dartmoor Prison, at an eleva-vatidii of about 1200 feet above the sea, a curious stuntedscrub of gnarled oak, said to be as old as the creation, METEOROLOGY. 31. shews that the prevailing wind has been south-west smce theoaks were acorns. The strange old trees stretch out their twisted, tangled,moss-grown, fern-clad arms towards the north-east, and bendtheir hoary tnmks in the same direction, as if seeking on the hill above them, agreat boulder, as big as a house,proves that some force strongerthan the wind has acted in thecontrary direction, towards thesouth-west. The stone has beenpushed from its place, and restson the hill side. ^Vllerever a tree grows onthe western coast of Ireland itbows its head to the exposed Welsh treebends towards the exposed tree on the west coast of Scotland seems tobe driven by a furious wind on the calmest day. AboutEdinburgh it is the same. On the east coast, on NorthBerwick Law, an old thorn tree streams towards the north-east, and every tree in that neighbou
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Keywords: ., bookpublisheredinburghsn, booksubjectgeo, booksubjectmeteorology
