RT Journal Article SR Electronic T1 On the mode of measuring the velocity of sound in wood JF American Journal of Science JO Am J Sci FD American Journal of Science SP 125 OP 132 DO 10.2475/ajs.s3-17.98.125 VO s3-17 IS 98 A1 Ihlseng, M. C. YR 1879 UL http://www.ajsonline.org/content/s3-17/98/125.abstract AB