Assertion: acetylene | /r/HasProperty | diluted with certain proportion of air
Facets:
Source sentences:
text: While these troubles were being experienced in England, attempts had been made in America to use acetylene diluted with a certain proportion of air which permitted it to be burnt in ordinary flat flame nipples; but the danger of such admixture being recognized, nipples of the same class as those used in England were employed, and the same troubles ensued.