From each other by their partings, but making together one great bed of from 25 to 40 ft.
The drainage basin measured from the water-partings of the enclosing mountains is some three times as great.
The"meridional ridges which formerly used to be traced here along the main water-partings do not exist in reality, and the country appears on the hypsometrical map in the Atlas de Finlande as a plateau of 350 ft.
For the reservation of the water-partings in the past considerably denuded by lumbermen and ranchmen the increase of the forest areas, and the creation of reservoirs along the rivers, to control their erratic flow 2 and impound their flood waste for purposes of irrigation, much has been done by the national government.
The forty ancient counties, remnants of various historical groupings and partings, are occasionally bounded by rivers.
Markable differences in the drainage areas of their two sides, with interesting illustrations of shifting water-partings; and the White, Gasconade, Osage and other rivers are remarkable for .upland meanders, lying, not on flood-plains, but around the spurs of a highland country.'
The water-partings are characteristically level uplands, often with shallow depressions, once lakes, and some of them still so.
The remainder of this extensive territory ranges at altitudes of 3000 to 4500 ft., even in the bottoms of the river valleys and in the lower plains; while the ridges which constitute the water-partings rise about 2000 ft.
The partings together do not amount to more than 2 or 3 ft.
The nature and extent of these operations vary with the character of the coal, which if hard and free from shale partings may be finished by simple screening into large and nut sizes and smaller slack or duff, with a final hand-picking to remove shale and dust from the larger sizes.