TY - JOUR T1 - Comparative Effects of different Parts of the Spectrum on Silver Salts JF - Proceedings of the Royal Society of London (1854-1905) VL - 40 SP - 251 EP - 254 PY - 1886/01/01/ UR - http://dx.doi.org/10.1098/rspl.1886.0033 M3 - doi:10.1098/rspl.1886.0033 AU - Abney, W. ER -