( M7 ) 
fible the Map of the Province of Pekjng> by Father 
Martini called Pe^eli , and by the Chinefe Tcheli or 
Ltpafoui L am, &c. 
JJRTOVX. 
XXVI. An Examen of the Chalybear, or Spa- 
Waters, called hy the Germans Acid or Sowre- 
Brunns, or Fountains 3 hut proved to he of a con - 
tvary Nature , thatis^ Alkali’s. By Dr. Fred. Slare, 
Fellow of the ColL of Thyflcidns and Gtyyal Society. 
I Have, for many Years pad, had more than a 
bare Sufpicion, that Phyficians and Learned Per- 
fons had impos’d upon themfelves and others Erroneous 
Notions about the Nature and Properties of thofe Mine- 
ral Waters, which are of the Chalybcat or Iron Species. 
Germany abounds much with thefe Waters, and they 
beftow one general Name upon them, and call them Some 
Brnnns , that is, fower Wells or Springs of Water. 
The Learned Germans , when they name them, or write 
of them, do call them Aciduts , ex. Gr. Spadenjes, SyvaU 
baccenfes vel Pyromontan a, <&c. Henricus ab Heers agrees 
with Vitmviui , Fallopio, and the Sagacious Helmont , and 
other Men of great Fame, in juftirying the Acidity of the 
feveral forts of Spa and Ghalibeat Waters 5 but, not being 
fatisfied with their Rea fons, afligns others 3 and after a 
tedious and obfcure Harangue, concludes. That they owe, 
their Birth and great Virtues to Vitriol and Sulphur. He 
obferves, that Vitriol and Sulphurate found in the Glebe 
or. Earth, from whence thele Waters dofpnng^ but yet 
does > 
