powder monkey

A boy formerly employed on board ships of war to carry gunpowder from the magazine to the gun; a ship's boy. "Ell an gowan had him placed as cabin-boy, or powder monkey, on board an armed sloop."- Scott : Guy Manner ing , ch. lii. powder-proce , s. Phot .: A photographic printing proce , depending upon the inability of certain organic bodies to absorb moisture after exposure to light in the presence of an alkaline bichromate. Plates are coated mixture of either dextrine or gum arabic, with sugar, glycerine, bichromate of pota ium or ammonium and water, and exposed under a positive while quite dry and warm. They are developed by brushing over them plumbago or other substance, in an impalpable powder, which only adheres to those parts which have absorbed moisture from the atmosphere.