Democratic Sentinel, Volume 20, Number 34, Rensselaer, Jasper County, 28 August 1896 — The Hardest. [ARTICLE]

The Hardest.

An experiment, with a view to ascertain the relative resistance, under pressure, of the hardest steel and the hardest stone, was recently made at Vienna. Small cubes, measuring 1 cm. of corundum and of the flnest steel, were subject to the test. The corundum broke under the weight of six tons, but the steel resisted up to forty-two tone. The steel split up with a noise like the report of a gun, breaking into n powder, and sending sparks In every direction which bored their way into the tike shot.