In the northern regions of the earth you will have often come across a certain metal under the name of Platina. Behold, this metal is already something similar to that matter which serves as an organism of the ruling central power of the earth; however, you must not think of this metal as if it were completely the same matter of which the above-mentioned organism consists. In general, you do not have to think of the interior of the earth as being of the same material nature as that matter which the surface of the earth offers for display; for this is only an outer, impalpable skin of the earth, while the interior of it behaves like flesh and blood to the outer skin, exactly to the outer impalpable rind, and therefore I can say nothing else for you comprehensibly about the inner matter of the earth than: – The Earth, Chapter 2, Paragraph 12