TY - JOUR T1 - An Analysis of Two Mineral Substances, viz. the Rowleyrag-Stone and the Toad-Stone. By William Withering, M. D.; Communicated by Joseph Priestley, LL. D. F. R. S. to Sir Joseph Banks, Bart. P. R. S. JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 72 SP - 327 EP - 336 PY - 1782/01/01/ UR - http://dx.doi.org/10.1098/rstl.1782.0022 M3 - doi:10.1098/rstl.1782.0022 AU - Withering, W. AU - Priestley, J. ER -