Five Foundry Tests of Zinc Bronzes - Discussion

W. M. CORSE, Mansfield, .Ohio.-We have sometimes seen in indi-vidual tests ultimate tensile strengths ass high as 55,000 lb. per. sq. in. being attained under electric furnace practice. These results, of course, average much lower than that, but with better methods of melting, can we hope to get the strength up to somewhere near the figure attained by these individual tests? C. P. KARR.--Yes, because with the electric furnace you can lessen the oxidation by means of the impurities always found in the melting. But one of the most important things in making 88-10-2 bronze of this class is to use a core-sand mold with a very open grain, so that the