TY - JOUR T1 - Extracts of Two Letters, Written to the Publisher from Hamborough by the Learned Christophorus Sandius, Concerning the Origin of Pearls JF - Philosophical Transactions (1665-1678) VL - 9 SP - 11 EP - 12 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1674.0006 M3 - doi:10.1098/rstl.1674.0006 AU - Sandius, C. ER -