The Atlantic seaboard, upon the other hand, is broad and inviting. The Appalachian range lies for the most part nearly a hundred miles inland. The gently sloping coast abounds in indentations,--safe harbors and generous land-locked bays, into which flow numerous rivers of considerable breadth and depth, by means of which the land can be explored for long distances from tide-water. By ascending the St. Lawrence and the chain of the Great Lakes, the interior of the continent is readily reached. Dragging his craft over any one of a half-dozen easy portages in Wisconsin, Illinois, Indiana, or Ohio, the canoe traveller can emerge into the Mississippi basin, by means of whose far-stretching waters he is enabled to explore the heart of the New World, from the Alleghanies to the Rockies, from the Great Lakes to the Gulf of Mexico. A carrying trail, at the headwaters of the Missouri, will lead him over to tributaries of the Columbia, whereby he gains access to the Pacific slope; while by another portage of a few miles in length, from Pigeon River to Rainy River, he is given command of the vast basin of Hudson Bay,--a labyrinth of waterways extending northward to the Arctic Ocean, and connected by still other portages with the Pacific. The Hudson River and Lakes George and Champlain form a natural highway from the St. Lawrence southward to the ocean. By the Mohawk and a short carrying-place, the Hudson was from early times connected with the Great Lakes. The Potomac, the Susquehanna, the Roanoke, and other Southern rivers can be traced northwestward to their sources in the mountains; and hard by are the headwaters of west-flowing feeders of the Mississippi. The Appalachian mountains run for the most part in parallel ridges northeast and southwest; and their valley system, opening out through the Cumberland Gap upon the Kentucky prairies and the valleys of the Ohio basin, also affords a comparatively easy highway from the Atlantic sea-coast to the interior. Sidenote: An inviting field for Aryan colonization. Thus with the entrance of North America facing the east, and with Europe lying but little more than one half the distance from Boston that Asia lies from San Francisco, it was in the order of things that from the east should have come the people who were to settle and civilize the New World. Colonists could on this side of the continent found new commonwealths, yet at the same time easily maintain their connection with the fatherland. The march of Aryan emigration has ever been on lines little diverging from due east or west. It is fortunate that the geographical conditions of North America were such as to make her an inviting field for the further migration of the race. Sidenotes: Geographical characteristics of New England and of the South. Three grand natural divisions of the Atlantic slope. Extractive industries. Soil. Climate.