Dr. O. F. has assur'd me that one day going about to make Helmonts and Lullys Coagulum he pour'd together Sp. of Urine and {spirit of wine} and finding a Salt to coagulate in the botom of the vessell which seem'd not of the ordinary sort, he tasted it, and found it, to his wonder, to tast just like Salt of Tart. Wherefore trying it in a good heat he found that it would not fly away but only flow like an Alcali. This gave me the hint of one sort of Ens Vegetabile.