TY - JOUR T1 - The Formation of the Anthocyan Pigments of Plants. Part IV.-The Chromogens JF - Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character (1905-1934) VL - 86 IS - 588 SP - 308 EP - 317 PY - 1913/05/22/ UR - http://dx.doi.org/10.1098/rspb.1913.0026 M3 - doi:10.1098/rspb.1913.0026 AU - Keeble, F. AU - Armstrong, E. AU - Jones, W. ER -