TY - JOUR T1 - A Contribution to the Knowledge of Persulphide of Hydrogen JF - Proceedings of the Royal Society of London (1854-1905) VL - 16 SP - 437 EP - 439 PY - 1867/01/01/ UR - http://dx.doi.org/10.1098/rspl.1867.0093 M3 - doi:10.1098/rspl.1867.0093 AU - Hofmann, A. ER -