Thermometer
See TEMPERATURE.
Thicknessing is the mode of obtaining a cast in metal, or plaster, by applying a coating or thickness over one surface of mould, produced by the sweep, strickle, block, or model, from which the remaining surface is then obtained and the thickness removed. The space previously occupied by the thickness being filled with metal or plaster, constitutes the cast. See BACKING-OUT; KETTLES; STATUE-FOUNDING.
Three-high Rolls are employed for rolling light merchant-iron. They are a combination of three rolls in one pair of housings. The middle roll in the series drives the upper and lower ones in opposite directions, delivering the bar at one side, to be returned by simply changing from one side to the other of the middle roll without any reversal of motion. See ROLLS.