TY - JOUR T1 - Researches on Spectrum Photography in Relation to New Methods of Quantitative Chemical Analysis. Part I JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 175 SP - 49 EP - 62 PY - 1884/01/01/ UR - http://dx.doi.org/10.1098/rstl.1884.0005 M3 - doi:10.1098/rstl.1884.0005 AU - Hartley, W. ER -