In some cases the material traverses the chamber from the coolest to the hottest part on a conveyer or in wagons.
The prevailing winds in this region, which the sea traverses longitudinally, are westerly, but the sea itself causes the formation of bands of low barometric pressure during the winter season, within which cyclonic disturbances frequently develop, while in summer the region comes under the influence of the polar margin of the tropical high pressure belt.
The Chesapeake & Ohio traverses the southern part of the state, from White Sulphur Springs in the east, through Charleston to the Ohio, serving the New and Kanawha rivers coal district as a freight carrier; the Norfolk & Western runs just within the south-western boundary along the valley of the Big Sandy, carrying coal both east and west from the Pocahontas coal-field; and the new Virginian railway entering at the south-east taps the coal-producing region (the Kanawha and Pocahontas districts) at Deepwater, serving in addition to the Norfolk & Western as a carrier of coal to Norfolk on the Virginia coast.
The railway between Mandas and Tortoli traverses some of the boldest scenery in the island, passing close to the Monte S.
The department is served chiefly by the lines of the Northern railway; in addition, the main line of the Eastern railway to Strassburg traverses the extreme south.