600. The first structure, in which the character of feldspar as regards its laminated form and its more argillaceous nature obtains the preponderance, is _Gneiss_--Feldspar-granite.
601. The first structure in which mica is the predominant character, is the _Mica-schist_--Mica-granite.
602. All rocks that do not belong to the calcareous formation come under these three forms. The progressive formation of the earth takes a threefold course, since it begins in a threefold and yet single manner in granite.
603. The gneiss and mica-schist precipitations followed subsequently to the completion of granite. For all precipitation is a true process, in which water has a certain tension peculiar to this process, by virtue of which this form of earth and no other has been produced.
604. By granite the silicious principally came out of water, but what was argillaceous and talcose remained behind.
605. Gneiss and mica-schist are indeed subdivided granite, but not in the sense of the already perfected granite having been again stirred up and dissolved, but as already separated in principles, in the primary water.
606. Gneiss and mica-schists are products of a more mighty operation of light than granite. They are nearer to the upper layers of water.
607. After the granitic rain, or after the formation of granite, the sphere of water was no longer perfectly transparent; but water was now found also in the primary valleys, in which the light had more power, and thus greater capacity for splitting. During the formation of granite the water has only become polar by light; but, as it was there wholly transparent without opposition, it could never attain to a perfect dualization. In the second earth-rain and in the valleys, the light on the contrary produces dualization of the fundamental earths, since the sides of the mountains afford opposition to the light, become themselves polar against the water, and at the same time heat is produced.
608. Gneiss and mica-schist enter into a polar relation with gravity, and that indeed as a Different to an Identical, as periphery to centre or as light to gravity.
609. Now the falling granite had in part lost its quartz and obtained a predominance of feldspar. Furthermore as the water-globe was already greatly collapsed, the crystals thus originated in larger drops, and occurred besides in water already stagnant or flowing. The schistose gefüge must have emerged as well through the preponderance of the laminar felspar, as by the flowing of water and the attraction of the granite-walls. This schistose granite is _gneiss_.