TY - JOUR T1 - A Relation, Concerning the Sal-Gemme-Mines in Poland; Communicated by a Curious Gentleman of Germany, Who, Some Years since, Descended Himself into Those Mines, to the Depth of 200 Fathoms, and Was Led about in Them for the Space of Three Hours JF - Philosophical Transactions (1665-1678) VL - 5 SP - 1099 EP - 2002 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1670.0012 M3 - doi:10.1098/rstl.1670.0012 ER -