TY - JOUR T1 - Researches into the Chemical Constitution of the Opium Bases.--Part IV. On the Action of Chloride of Zinc on Codeia JF - Proceedings of the Royal Society of London (1854-1905) VL - 19 SP - 71 EP - 73 PY - 1870/01/01/ UR - http://dx.doi.org/10.1098/rspl.1870.0016 M3 - doi:10.1098/rspl.1870.0016 AU - Matthiessen, A. AU - Burnside, W. ER -