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.