RT Journal Article SR Electronic T1 On the diamond in the Canon Diablo meteoric iron and on the hardness of carborundum JF American Journal of Science JO Am J Sci FD American Journal of Science SP 470 OP 473 DO 10.2475/ajs.s3-46.276.470 VO s3-46 IS 276 A1 Kunz, George Frederick A1 Huntington, O. W. YR 1893 UL http://www.ajsonline.org/content/s3-46/276/470.abstract AB