%Q0 
A SYSTEM OF 
With a calcareous earth. White fpa^ 
thofe iron ore. The Stahlfiein of the 
Germans. See Se6t. xxx. 
1. With a filiceous earth. The Martial 
Jafper or Sinople. Seft. Ixv. 
€, With a garnet earth. Garnet and coc-^ 
kle or Ihirl. Sed. Ixix. 
i. With an argillaceous earth, The bole. 
Sed. Ixxxvi. 
c. With a micaceous earth. Mica. Seft, 
xcv, 
/, \Vith manganefe. Sed. cxvi. 
SECT. CCVIIL 
g. With an alcali and phlogifton, Cah 
martialis phlogijlo jun5la^ et alcali precis 
fit at a. Blue martial earth, Native PruC? 
fian-like blue. 
I.oofe or powdry, found among the 
turf in the levels of the province of 
Skone : Alfo in Sax Weiffenfels, and 
at Noi*vlanden in Norway, &c. 
SECT. CCIX. 
A With an unknown earth, which hardens 
. in water. Calx martis terra incognita 
aqua indurefcente mixta, Tarras, Ce- 
mentum, 
1 . Loofe or granulated, ^erra Puzzolana^ 
from Naples and Civita Vecchia in 
Italy, This is of a reddifh brown 
colour, is rich in iron, and is pretty 
fufible. 
2. Indurated, Ccmentuminduratum^ from 
Cologne, 
This 
