Origin of calc-spar
Examples from the Web for calc-spar
Historical Examples of calc-spar
He invented a machine for the cutting of crystals from calc-spar.History of the Sixteenth Connecticut Volunteers
B. F. Blakeslee
In calc-spar, as just stated, the ordinary ray is the most refracted.Six Lectures on Light
Argentine, a silvery-white slaty variety of calc-spar, containing a little silica with lamin usually undulated.
Calc-spar will not supply the place of flint, nor lead the place of steel, in the production of fire by collision.Fragments of science, V. 1-2
It is harder than gypsum, but not so hard as calc-spar; flexible and elastic; spec.