TY - JOUR T1 - On Vacua as Indicated by the Mercurial Siphon-Gauge and the Electrical Discharge JF - Proceedings of the Royal Society of London (1854-1905) VL - 10 SP - 274 EP - 275 PY - 1859/01/01/ UR - http://dx.doi.org/10.1098/rspl.1859.0053 M3 - doi:10.1098/rspl.1859.0053 AU - Gassiot, J. ER -