Preparation , Trituration of the copper-red crystals, obtained from the slag at the bottom of a blast iron furnace (consisting of Titanium cyanide and Titanium nitride). Authority. Sharp, in letter to Brodie, p. 93 (Am. Hom. Rev., vol. 3 1863, p. 516); triturated the crystals; the proportion was 1 grain to 99 of sugar of milk; took 2 grains daily, for a week.