"Scoria" Quotes from Famous Books
 ... but admire the natural advantages of the place chosen by his captors for the meeting. Rolling hills surrounded the little pocket on all sides, and here and there a red scoria butte thrust its ugly height out of the plain. The chances ...
— The Free Range • Francis William Sullivan
... portion of cupel is yellow when cold. A greenish tint may be due to small quantities of copper or, perhaps, nickel, cobalt, or platinum. Larger quantities of copper give a greenish grey or almost black colour. A dark green and corroded cupel may be due to iron. Rings of pale-coloured scoria may be due to tin, zinc, antimony, or arsenic. When the cupel shows signs of the presence of these metals in objectionable quantity, it is well to repeat the assay and scorify so as to ...
— A Textbook of Assaying: For the Use of Those Connected with Mines. • Cornelius Beringer and John Jacob Beringer |
