TY  - JOUR
T1  - Some Experiments upon the Ochra Friabilis Nigro Fusca of Da Costa, Hist. Foss. p. 102.; and Called by the Miners of Derbyshire, Black Wadd. By Josiah Wedgwood, F. R. S.
JF  - Philosophical Transactions of the Royal Society of London (1776-1886)
VL  - 73
SP  - 284
EP  - 287
PY  - 1783/01/01/
UR  - http://dx.doi.org/10.1098/rstl.1783.0018
M3  - doi:10.1098/rstl.1783.0018
AU  - Wedgwood, J.
ER  -