I cannot therefore conclude with Kircher a, that the 
Natron is not fpecifically diftind from Salt Petre; or with 
Libaviusthzt it is a compolition of Alum, Sea-fa't, and 
white-Wine. And thefe are all the O bfervations which I 
have been able to make at prefent concerning this Mi- 
neral, if any more occur, you fhall have an account 
of them, from 
Your humble Servant, 
C* La 
(aj Mund.Jubterr, Ld» feU.fecunda^ cap.pri?n. 
Tuta 
