Sulphocyanic Acid
HCNS; hydrogen sulphocyanate; a monobasic acid obtained by decomposing lead sulphocyanate suspended in water, with sulphuretted hydrogen. It is a colorless, very acid liquid, with a pungent acetous odor, and solidifies at- 12.5° to hexagonal plates. Heated to 100° it boils, but the greater part suffers decomposition.
It colors ferric salts an intense bloodred, and on this account is used, in the form of any of its soluble salts, to detect traces of iron.
SULPHUR. Sulphur, or brimstone, has been known and used from the earliest times. It is found native in mechanical combination with various earthy impurities in most volcanic districts, more parwhich are the full-length portraits of ticularly in Sicily and the countries Dr. Benjamin Rush, Commodore De- bordering on the Mediterranean, and in , and in catur, Thomas Jefferson, and Lafayette. Louisiana and Texas. The native sulphur The Boston Museum possesses his cele- of commerce was formerly derived brated picture of "Washington Crossing chiefly from Sicily, where it occurs in the Delaware." He died in Philadelphia beds of blue-clayey formation. It is Nov. 5, 1872.