348 Huttonian Theory. to which it communicates different colours, which lhews that the quartz, felfpar and mica, muft have cryftallized or taken their prefent form from a ftate of folution ; and cryftals of mica have been obfer- -ved included in the cryftals or concretions of quartz, that is, cryftals of the mcfft fufible fub- ftance included in the leaft fufible,—a fad of itfelf fufficient to ftievv that the ftrudure and .pofition of thefe rocks is not owing to the agency of heat. It follows irrefiftibly from thefe fads; that gneifs and mica-flate are true .chemical produdions; and as gneifs paffes into granite, and mica-flate into clay-flate, all thefe rocks are to be confidered as belonging to the fame fpecies of formation. We have tthue fucceeded in proving, that the four great primitive rocks, Granite, Gneifs, Mica-flate, and Glay-flate, are not compofed of materials de rived from rocks older than themfelves, but are in the ftrideft fenfe Primitive. Therefore the prefent world hasnot derived its materials from one or more worlds antecedent to it, and confequent- ly this grand principle of the Huttonian Theory falls to the ground *. Note D.—(Page 83. Parag. 45.) Deluge. In this paragraph, phenomena are mentioned, that appear to intimate a repeated rifing of the wa- r ters * For a complete refutation of the chemical arguments adduced in fupport of the Huttonian Theory, I refer to Mr Murray’s comparative view of the Neptunian and Hut tonian fyftem, in the fourth volume of his Syftem of Che- miftry.