TY - JOUR T1 - Researches in Spectrum Photography in Relation to New Methods of Quantitative Chemical Analysis. Part II. JF - Proceedings of the Royal Society of London (1854-1905) VL - 36 SP - 421 EP - 422 PY - 1883/01/01/ UR - http://dx.doi.org/10.1098/rspl.1883.0122 M3 - doi:10.1098/rspl.1883.0122 AU - Hartley, W. ER -