Sullivan's Case

This is a proceeding under the workmen’s compensation act. The question for decision is whether the employee received a personal injury arising out of and in the course of his employment, or whether he was merely suffering from disease so induced. His work was on granite or other stone with a surface cutting machine. Its method and effect of operation were described by him as follows: “This machine comes down with a point and hammers .... The power ... is furnished by compressed air. . . . That hammer comes up and down on the stone. The purpose of this machine in cutting stone is to refine it…