Wiktionary
iron vitriol
n. (context obsolete chemistry English) iron(II) sulfate
Usage examples of "iron vitriol".
He had dabbled in alchemistic experiments himself, making distillations, aqua regia, aqua fortris, and iron vitriol.
An ounce dried and powdered, boiled in three- quarters of a pint of water with an equal amount of logwood, with solution of copper, tin, and bismuth, 6 grains of each, and 2 drops of iron vitriol, will dye a deep boue de Paris.