Comparative geography

by Carl Ritter

We turn away from these glances into the future to look upon the past, the long ages when men lived in rudeness and ignorance, having no art, and knowing nothing beyond the little tract where they were born, and to which they remained chained. There was no binding of shore to shore, and of continent to continent, through the mediatorial agency of seas and oceans. And this gave to the continents a far greater individuality than they have now, and a much higher degree of apparent influence than now when we cannot view them excepting as parts of the great complex which forms the world. The wanderings of the old nomadic races, the enlarging of the domains of culture, the transfer of the natural productions of all climes, as well as the traditional ideas of all lands, proceeded from the central portions of the ancient world toward the extremities. The manner of this progress, following as it does the order of history, displays more clearly than almost anything else the close dependence of all national development upon geographical conditions, and their indissoluble connection. Without this connection the order of historical events would have been completely changed. In no instance has there been self-evolved progress in the North, East, South, or West; it uniformly began at the geographical center, at the point of conflict between the Orient, the Occident, and the tropical South.

Western Asia, northern Africa, and southeastern Europe were the homes of the earliest culture, and it is to them that all other parts of the world owe the light which they enjoy, though they may have received it at second or third hand. The territory of which I speak extended from the highlands of India to Italy, and from the Nile to the Don, including the valleys of the Euphrates and the Gihon. This broad and fertile reach of territory has been the fruitful mother of the world’s present thought and culture. Nor must we overlook the fact that, despite what was said above, regarding the oceans as the greatest barriers to the spread of civilization, that smaller seas aided it, for the very country of which I speak was intersected by five important seas, and to them it is under immeasurable obligations for its development. This Asiatic-Africo-European belt has exercised the greatest influence on all the course of human affairs, on all colonization, on the differing of races and languages, and the arts of war and of peace, over the habitable world. This territory lies as the background of all the events of history, and has given to every one its distinctive character and its appropriate place. Nor can we in the future dispense with the element involved in this, of historical occurrences yet to come dependent on past geographical conditions, although this will be far less marked than it has been in the past. It demands and will demand a far larger measure of investigation and thought than it has yet received. Whatever independent progress the New World and Australia may seem to be making, and whatever interest they may awaken in the minds of students, not even they can be looked at without regard to their relations to the ancient historical lands, the source of all the inherited culture which they are enjoying in their vigorous youth. India, Egypt, Palestine, Greece, and other countries still stand out as the formative lands of all modern history, and we cannot study the present without studying them. They are to the student what Plutarch’s Lives are to the biographer, the imperishable and unequaled models which gain new luster as time rolls on. It is therefore not without reason that ancient geography ought to be subjected to a more systematic treatment than the geography of the Middle Ages. The latter, though not unworthy of a large place, had no relations of special importance to the whole world, to the study of the physical conditions of the most imposing objects of nature, to the connection as cause and effect of events past, present, and to come.

From these foundation principles, we advance to a more full study of the configuration of the surface of the globe, for which we are now in a measure prepared.

PART II.

A more extended Investigation regarding the Earth’s Surface.

It is the province of Hydrography to deal with the oceanic world; Geography proper concerns itself simply with solid forms. The Hydrography of the globe we must pass over, however. Aside from the fact that it would lead us into studies of the most protracted nature, it forms strictly one department of nautical science. Besides, there is the less occasion to speak of it here at length, that works of great excellence have been published, relating to that branch. We turn therefore to the land, and shall study the world of waters only so far as it exerts influence on the land.

By land we mean the islands as well as the continents, for, as remarked before, the difference between them is merely relative. To the land division of the globe, however, belong all rivers and the internal fresh water lakes, however large. The basis of difference does not lie in the fact that one part of the globe is water, the other part land, but in the fact that one is a tract of uniform evenness, the other of constantly varying surface, the internal rivers and lakes only being frills, so to speak, to the elevated region, and not sharing the sea level of the great oceanic mass. Uniformity of surface is then the chief characteristic of the sea; a lack of it, of the land. A mathematical level is a thing unknown on extended districts, and an approximation to it is very rare. Even the basins of former seas do not display a perfectly level bed. The plains of North Germany are characterized by this billowy rolling. The flats along the Danube, in Hungary, and along the Po, in North Italy, have really important deviations from a true level, though the eye is not able to discern them. Milan is four hundred feet above the Adriatic; but the eye does not discern that it is not at the center of a plain as perfect as the surface of the sea itself, and yet that plain does shelve gradually away till the Adriatic checks and defines it. Pesth is two hundred and fifteen feet above the ocean level, yet the gradual decline to the Black Sea is undiscernible to the eye. The immense plains along the Amazon, even the celebrated llanos on the Orinoco, which Alexander von Humboldt likens to inland seas of verdure, have a not insignificant slope from west to east. The middle point of these llanos near the City of Calabozo, about 100 geographical miles from the sea, he found to be 180 feet above the sea level; far lower indeed than Milan or Pesth, relatively, yet at a perceptible elevation. All of these plains were once the bottom of the sea; the Adriatic laved the base of the Apennines and the Cottian Alps, and the Atlantic swept westward over the llanos of the Orinoco and the Essequibo, having the Sierra de Venezuela on the north and the Sierra Parima on the south, till it was checked by the Cordilleras of Merida and Pamplona.

Depression and elevation, then, are the characteristics of the land. They are both measured from the level of the sea; their absolute altitude is reckoned from the imaginary sea level, extended over the whole globe. Their mutual relations to each other are determined from their relative heights. The absolute elevation above the level of the ocean can be determined in a number of ways. If the heights to be measured are in the immediate vicinity of the sea, a simple system of triangulation will effect it. If they are removed from the sea, the difficulties are greater, and increase according to the distance from the sea. The heights of great inland mountains are determined by complicated operations with the spirit-level, protracted trigonometrical calculations, the unwearied and skillful use of the barometer, and constant appeal to the boiling point of water. The description of these methods falls within the province of Physics.

As the determination of the heights of the loftiest mountains could not be made before the appointments of scientific explorers have attained to a certain degree of accuracy and delicacy, the knowledge of them in former times was almost wholly relative. The inquiries of La Condamine, Saussure, and de Luc, in the Andes and the Swiss Alps, are almost the only ones to be trusted among those of the older observers. All unscientific travelers without accurate instruments confounded absolute heights with relative heights, and innumerable errors crept therefore into the earlier text-books. It is only within the most recent times that Hypsometry has attained to the dignity of a science.