Goldschmidt Thermit Co. v. Primos Chemical Co.

BUFFINGTON, Circuit Judge.

It may be said of metals generally that in their natural state they are combined with other elements, usually oxygen, and their reduction can be effected by the use of carbon, because of its affinity for oxygen. In the case of iron, the carbon comes in contact with the ore, with the result that some of the carbon remains with the metal as an impurity. But such impurity is, in the ordinary use of iron, not objectionable. In the case of other metals, where such impurities would be objectionable, they were avoided by placing the ore to be treated inside of, and the fuel…