February 13, 1969 COOKE, J. Appeal from decisions of the Workmen's Compensation Board, filed July 21, 1967, October 24, 1967 and March 27, 1968, which affirmed and reaffirmed the Referee's award of compensation benefits to claimant for permanent total disability found to be due to causally related silicotuberculosis, an occupational disease. Claimant worked in the mill room of the John Deere Plow Co. foundry at Syracuse for 36 years during which time he was exposed to sizeable amounts of sand and