Webster's 1828 Dictionary
CALKING
n.Cauking. In painting, the covering of the back side of a design with black lead, or red chalk, and tracing lines through on a waxed plate or wall or other matter, by passing lightly over each stroke of the design with a point, which leaves an impression of the color on the plate or wall.
CALKING-IRON
n.Cauking-iron. An instrument like a chisel, used in calking ships.
Webster's 1913 Dictionary
CALKING
CALKING Calk "ing, n.
Defn: The act or process of making seems tight, as in ships, or of furnishing with calks, as a shoe, or copying, as a drawing. Calking iron, a tool like a chisel, used in calking ships, tightening seams in ironwork, etc. Their left hand does the calking iron guide. Dryden.
The Wordsmith Dictionary