How to pronounce “subtile” in English

the last fifty years, we have not overstepped the moral bounds of science by perverting the knowledge which Man came into possession of surreptitiously when he ate of the 'forbiddenfruit.'" "When Benjamin Franklin first called down the lightning from the sky he was accursed by the superstitious or reverential with 'tempting the Almighty.' Now we handle the subtile element,electricity, as if it were inert matter, and we impress it into our nurseries as a toy for the children!" "We tap the bowels of the earth and subject to our domestic use the vapors. We experiment