chasing tool (chasingtol)

A tool used in chasing. Such tools are either punches, gravers, or chisel-shaped tools with blunt edges; they are applied by being held in contact with the metal and struck lightly with a hammer or mallet. Chas les i an (shäl'zi-an), a. Pertaining to the French geometer Michel Chasles (1793-1880).Chas les i an shell, an infinitely thin shell of homogeneous matter, coinciding with an equipotential surface and having a thickne everywhere proportional to the attrac tion.