TY - JOUR T1 - On the Mechanism by Which the First Sound of the Heart Is Produced JF - Proceedings of the Royal Society of London (1854-1905) VL - 61 SP - 331 EP - 343 PY - 1897/01/01/ UR - http://dx.doi.org/10.1098/rspl.1897.0045 M3 - doi:10.1098/rspl.1897.0045 AU - Quain, R. ER -