If a man were to be raised in a balloon high enough above the continent of Europe to survey the whole of it at one view, he would see the land gradually rising from the borders of the sea on every side, towards a portion near the centre, where he would behold a vast region of mountainous country, with torrents of water running down the slopes and through the valleys of it, while the summits were tipped with perpetual snow. The central part of this mass of mountains forms what is called Switzerland, the eastern part is the Tyrol, and the western Savoy.