TY - JOUR T1 - Preliminary Determination of the Wave-Lengths of the Hydrogen Lines, Derived from Photographs Taken at Ovar at the Eclipse of the Sun, 1900, May 28 JF - Proceedings of the Royal Society of London (1854-1905) VL - 68 SP - 33 EP - 35 PY - 1901/01/01/ UR - http://dx.doi.org/10.1098/rspl.1901.0009 M3 - doi:10.1098/rspl.1901.0009 AU - Dyson, F. ER -