TY - JOUR T1 - Photo-Chemical Researches. Part V. On the Direct Measurement of the Chemical Action of Sunlight JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 153 SP - 139 EP - 160 PY - 1863/01/01/ UR - http://dx.doi.org/10.1098/rstl.1863.0007 M3 - doi:10.1098/rstl.1863.0007 AU - Bunsen, R. AU - Roscoe, H. ER -