TY - JOUR T1 - Note on the Specific Gravity of the Vapours of the Chlorides of Thallium and Lead JF - Proceedings of the Royal Society of London (1854-1905) VL - 27 SP - 426 EP - 428 PY - 1878/01/01/ UR - http://dx.doi.org/10.1098/rspl.1878.0073 M3 - doi:10.1098/rspl.1878.0073 AU - Roscoe, H. ER -