We see, by this table, that one of the general slopes of the continents is always, if we take the mean, at least four or five times as large as the other.

3. This law of increase of reliefs is common to the mass elevations, and to the linear elevations; that is, the height of the low lands and of the table lands. increases at the same time with the absolute elevation of the mountains. There is a proportional gradation.

This law is exhibited by the following table, containing the principal elements I have used in constructing the profiles. As they are intended to set in a clear

light the most general features of the relief of the continents, these profiles do not always follow an exactly straight line, but they sometimes embrace rather a transverse zone. For the same reason I merely indicate, without taking them into the view, several lofty volcanic peaks, isolated like the Ararat, the Erdshish of Asia Minor, which, considered in relation to the general relief of the countries where they are found, are but accidents, and cause only a local modification. They are marked in the tables by an asterisk.

The first column contains the height of the plateaus, the second that of the loftiest corresponding peaks, both in English feet. In plates II. and ш. they are both indicated by their initials.

OLD WORLD. North to South.

1.- EASTERN ASIA.