TY - JOUR T1 - Application of Liquid Hydrogen to the Production of High Vacua, together with their Spectroscopic Examination JF - Proceedings of the Royal Society of London (1854-1905) VL - 64 SP - 231 EP - 238 PY - 1898/01/01/ UR - http://dx.doi.org/10.1098/rspl.1898.0097 M3 - doi:10.1098/rspl.1898.0097 AU - Dewar, J. ER -