TY - JOUR T1 - Note on Photographing Sources of Light with Monochromatic Rays JF - Proceedings of the Royal Society of London (1854-1905) VL - 60 SP - 13 EP - 15 PY - 1896/01/01/ UR - http://dx.doi.org/10.1098/rspl.1896.0005 M3 - doi:10.1098/rspl.1896.0005 AU - Abney, W. ER -