and impregnated it with a known proportion of Gall: then by 
degrees I let fall into it the Salt of Iron 5 until I found it thereby 
as deeply tinged red, as the fame quantity of Farrington-mtQxs 
would be by the fame proportion ot Gall.- The quantity of the 
Salt of Iron^that performed this^was near two grains. This wa- 
ter^ fo tingedjtafted and fmelt juft as the natural water from the 
Spring with Gall did: If! added a greater proportion of Salt ^ 
it would make it naufeous and Emetical, Skrhm , Decemh. 
17. i6€9. 
The Caufes of Mineral Sf rings further inquired: Andthe (irange 
and fecret Changes of Liquors examined bj Dr. 5^. BealCj u 
the P Mi/her. 
8if5 
I Am much obliged to my honored Friend Dr H. for his Ana-^ 
lyfis of Mineral Springs, and his A nimadverfions relating to 
that Argument. I offer no Objedion againftthe Note, that 
fome Waters do lick up the SaltSjbefore they be perfedly fixt in 
the Materials of Metals: Only this I humbly propofe for further 
Inquiry 5 Whether fome Watcrs^by their long paflage through 
fub- terraneous fleams of divers kinds, and by heats and coo- 
lings ^ and by many changes of thefe^ andby fcveral kindsof 
ftrainings, bycoUifions, an 1 manifold alterations of the con- 
texture of their minute parts may not firft acquire fome Metallin 
Tindurc-, and thence affift the Generation of Parfeft Metals, 
if they meet with fit miiterials 5 Or if they Ihould be further con- 
coded 5 before they be intercepted by opening the Spring f If 
this may fometimes fallout , then we may infuch cafes avoid 
the difficulty of undertaking , that Metals, there continued hun- 
dreds of years,arc imperfcft and in fieri. And perhaps the Chalj-- 
teat and other Metalline Spirits may be purer and more through- 
ly deopilative , before they be embodied into firm Metals,than 
afcer they are by Fire extrafted. And then this may be a fecret 
caufe, why fome Springs prove feffedually Medical,when 0- 
therMcdicinsdo faile. 
Learned faith > Tellus Mater omnium. And we can ea- 
fily apprehend , that all folid Bodies , even Gold and firmefl: 
R r r r r JcW- 
