Jean Maritz II, 22, continuator of his father Johannes' Work, co-inventor of the Horizontal Drilling Machine Johann Maritz, 54, is a Swiss gun-maker, established as Commissionner of the French Royal Foundry at Strasbourg. He first invented a method of vertical drilling twenty-one years ago to replace the old commonplace method of casting the gun around a core made of clay. The purpose was to improve bore accuracy and was met, but the process was rather slow. This time, the