At Pillersee, in Austria, Spathic iron ore has been reduced by a mixture of fir-wood charcoal, and air-dry peat in the proportions of three parts by bulk of the former to one of the latter.
"Peat and its Uses as Fertilizer and Fuel"
Samuel William Johnson
The property of the Spathic acid, to corrode flinty substances, has been lately applied by a Mr. Puymaurin, to engrave on glass, as artists engrave on copper, with aquafortis.
"Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson"
Thomas Jefferson