TY - JOUR T1 - On a Native Arseniate of Lead JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 99 SP - 195 EP - 205 PY - 1809/01/01/ UR - http://dx.doi.org/10.1098/rstl.1809.0013 M3 - doi:10.1098/rstl.1809.0013 AU - Gregor, W. ER -