To anchor the roots of the teeth solidly as in the jaw, holes were drilled in a heavy brass bar. A hole was filled with molten "Weeds" metal, an antimony alloy that melts below the boiling point of water. The root was held in the liquid metal until the alloy was solid and all mounted teeth could not be moved until the metal was remelted. The method of breaking the teeth varied but usually consisted of pulling steadily on them by means of a hooked notch cut in a brass bar as illustrated.
Paul L. Kirk investigation, forensic testing, teeth