INCOMBUSTIBLE • FREE TRANSLATOR.ORG • Definition of Incombustible

... observed that tobacco is a very exhausting crop to the soil. The worn-out tobacco-plantations of the South are sufficient practical proof of this, while it is also readily explained by chemistry. The leaves of tobacco are among the richest in incombustible ash, yielding, when burned, from 19 to 28 per cent. of inorganic substance. This forms the abundant ashes of tobacco-pipes and of cigars. All this has been derived from the soil where it was raised, and it is of a nature very necessary to vegetation, and not ...

— Atlantic Monthly Volume 6, No. 34, August, 1860 • Various

... his wife in the fire; what could he expect but that she would be burned? It did not alter the case that Mrs. Sharp had been also in the fire, but came out unconsumed. She was made of sterner stuff. Stubble would burn, but rocks were incombustible. ...

— Hubert's Wife - A Story for You • Minnie Mary Lee