Rolling bridge. See the Note under Drawbridge. -- Rolling circle of a paddle wheel, the circle described by the point whose velocity equals the velocity of the ship. J. Bourne. -- Rolling fire (Mil.), a discharge of firearms by soldiers in line, in quick succession, and in the order in which they stand. -- Rolling friction, that resistance to motion experienced by one body rolling upon another which arises from the roughness or other quality of the surfaces in contact. -- Rolling mill, a mill furnished with heavy rolls, between which heated metal is passed, to form it into sheets, rails, etc. -- Rolling press. (a) A machine for calendering cloth by pressure between revolving rollers. (b) A printing press with a roller, used in copperplate printing. -- Rolling stock, or Rolling plant, the locomotives and vehicles of a railway. -- Rolling tackle (Naut.), tackle used to steady the yards when the ship rolls heavily. R. H. Dana, Jr.