RT Journal Article SR Electronic T1 On a method of obtaining autographic records of the free vibrations of a tuning fork, and on the autographic recording of beats JF American Journal of Science JO Am J Sci FD American Journal of Science SP 444 OP 453 DO 10.2475/ajs.s3-27.162.444 VO s3-27 IS 162 A1 A. G. Compton YR 1884 UL http://www.ajsonline.org/content/s3-27/162/444.abstract AB