Records first use of telegraphy to record and measure the heart beat and pulse, written and published by the patient, who lived to the age of 45. This was done in Boston with an instrument placed against Groux’s chest, the other end of which was in contact with the circuit breaker of the telegraph. Dr. J. B. Upham called his device a sphygmosphone. Includes reprint of "Report of the Committee of the N.Y. Pathological Society, appointed to examine the case of Mr. E. A. Groux….", American medical monthly, 1859, 11, 35-40 with supplementary material, and new illustrations.