Autogravure
a process of photoengraving, patented by J. R. Sawyer, of London, in 1884. If an ordinary autotype carbon print be placed on silvered copper instead of on paper, the slight relief which the picture possesses is enough to admit of an electrotype being taken from it. The raised parts of the print become the depressed parts in the electrotype. The latter can, therefore, be used for taking impressions from in the same way as an engraved copperplate.
AUTOLYCUS (aw-tol'e-kus), a son of Mercury, by Chione, a daughter of Dædalion, and one of the Argonauts. His exploits as a thief have been greatly celebrated.
AUTOMATIC GUN. See MACHINE GUN.