TY - JOUR T1 - On the Action of Light upon the Colour of the River Sponge. JF - Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London (1800-1843) VL - 4 SP - 72 EP - 72 PY - 1837/01/01/ UR - http://dx.doi.org/10.1098/rspl.1837.0032 M3 - doi:10.1098/rspl.1837.0032 AU - Hogg, J. ER -