TY - JOUR T1 - Photochemical Investigations of the Photographic Plate JF - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934) VL - 98 IS - 690 SP - 154 EP - 170 PY - 1920/11/03/ UR - http://dx.doi.org/10.1098/rspa.1920.0060 M3 - doi:10.1098/rspa.1920.0060 AU - Slade, R. AU - Higson, G. ER -