TY - JOUR T1 - An Appendix to the Discourse Concerning the Salt-Work, Publisht in Numb. 53. Communicated by the Same Doctor Jackson, in a Letter of Novemb. 20. 1669 JF - Philosophical Transactions (1665-1678) VL - 4 SP - 1077 EP - 1079 PY - 1753/01/01/ UR - http://dx.doi.org/10.1098/rstl.1669.0052 M3 - doi:10.1098/rstl.1669.0052 AU - Jackson, D. ER -