Show testing brass braes pipe one of tho the most interesting checks on the temper and chemical characteristics of brass pipe Is the ability of the chemist to look inside tho the metal with the aid of a microscope and see the grala grain structure of the brass itself to the experienced eye of the brass brais chemist the formation size and color of the grain will tell many things about the metal they will show the temper of the brass and it Is many times possible to detect dangerous stresses which leave leava a pipe liable to season cracks the manufacture of brass pipe lias has made great progress pro gres since the old days when the metal was cast by the 1 I hope so rather than the 1 I know why process brass making Is a scientific business and brass pipe JS Is now produced constant in alloy standard in temper with dangerous dar erous stresses caresses removed by scientific heat treatments scientific Ame american ikan |