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

D. Jackson
1669 Philosophical Transactions of the Royal Society of London  
doi:10.1098/rstl.1669.0052 fatcat:ljsckbxmqjdhlh3s24h2ovjmj4