A Discourse Denying the Prae-Existence of Alcalizate or Fixed Salt in Any Subject, before It Were Exposed to the Action of the Fire: To Which is Added a Confirmation of an Assertion, Deliver'd in Numb. 101. p. 5. Section 6. of These Tracts, viz. That Alcalizate or Fixed Salts Extracted out of the Ashes of Vegetables, Do Not Differ from Each Other: The Same Likewise Affirmed of Volatil Salts and Vinous Spirits; by the Learned Dr. Daniel Coxe