Crossword-Solution: MOHS 4 letters, 108 clues 🏆 scrabble score: 9

Werner first distinguished augite from hornblende; and his proposal to separate them obtained afterwards the sanction of Haüy, Mohs, and other celebrated mineralogists.

Hugh, on Pteraspis, 446 _Mitra Scabra,_ Barton clay, 259 Mitscherlich, on Isomorphism, 502 _Modiola acuminata,_ Permian, 387 Moel Tryfaen, shells found at, 181 Mohs on isomorphism, 502 Molasse, Lower, of Switzerland, 235 ——, Middle, or Marine, of Switzerland, 223 ——, Upper, fresh-water, of Switzerland, 217 ——, term explained, 217 Mollusca.

Passing on to the next mineral in the scale of hardness we come to chrysoberyl, which is rated as 8-1/2 on Mohs's scale.

CLINTONITE, a group of micaceous minerals known as the "brittle micas." Like the micas and chlorites, they are monoclinic in crystallization and have a perfect cleavage parallel to the flat surface of the plates or scales, but differ markedly from these in the brittleness of the laminae; they are also considerably harder, the hardness of chloritoid being as high as 6½ on Mohs' scale.

Whether Weiss or Mohs contributed most to advance crystallography to its more philosophical stage, it is not important here to inquire.