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, CHAP. I. DESCRIPTION OF THE SURFACE OF THE EARTH. I. TTTHEN we take a very general view of the VV Earth, it appears as a globular folid mafs, whofe furface is diverfified by numerous eminences, of various magnitudes and forms. 2. Experience teaches us, that the great foflil mafies, of which the folid body of the earth is com- pofed, when viewed on the great fcale, have a ta bular form, and are confequently more extended in length and breadth than in thicknefs. • We alfo find, that thefe maffes are not always compofed of the fame materials. Further, the Vol. III. A folid