TY - JOUR T1 - A New Portable Miner's Safety-Lamp, with Hydrogen Attachment for Delicate Gas-Testing; with Exact Measurements of Flame-Cap Indications Furnished by This and other Testing Lamps JF - Proceedings of the Royal Society of London (1854-1905) VL - 52 SP - 484 EP - 503 PY - 1892/01/01/ UR - http://dx.doi.org/10.1098/rspl.1892.0092 M3 - doi:10.1098/rspl.1892.0092 AU - Clowes, F. ER -