...whose word in geology and mineralogy carries with it the weight of an authority. Says Dr. Frazer, " Every true mineral is a definite chemical compound...its parts, and capable of expression in a formula. Its molecule is a distinctive whole — the unit of its mass — and incapable of division as long...

...physical tests, that one should be able by these tests to assign their proper chemical constitution. Every true mineral is a definite chemical compound,...parts, and capable of expression in a formula which represents — at least — the proportions in which the atoms of the same or different elements are...

...and additions were so numerous as to make virtually a new book. The principle is insisted upon that every true mineral is a definite chemical compound...throughout its parts, and capable of expression in a chemical molecular formula. This principle, which was at first opposed by Prof. Dana, has now been...

...and additions were so numerous as to make virtually a new book. The principle is insisted upon that every true mineral is a definite chemical compound...element, homogeneous throughout its parts, and capable of esprcssion in a chemical molecular formula. This principle, which was at first opposed by Prof. Dana,...

...— whose word in geology and mineralogy carries with it the weight of an authority. Says Dr. Frazer: "Every true mineral is a definite chemical compound...its parts, and capable of expression in a formula. Its molecule is a distinctive whole — the unit of its mass — and incapable of division as long...