eR 
eo N14 
| sd or. LITTLE'S KY ok E Ee. 
-kiln. The iron to! be chofen rof "the b beft 
pe a ; its ts toughnefs 4 and malleability ; are mar irks of choice. - d 
Of the Ore of iron. This i is often. “difcovered by the. magnet, 
but a great part of tl the beft ore, is that ‘which tl the: magnet will not 
attract, as Linneus and Macquer juftly obíerve. When in.that 
ftate it often refembles the ruft or calx offi iron. Many tuns of 
which are breught to the iron-works . in this neighbourhoo : 
from which the beft of iron is made. In its natural ftate the 
beft magnetic bar will not attract the fmalleft particle; but when 
roafted with charcoal it. becomes magnetic. - ` "Fhis method of 
knowing. whether any earth .or {tones contain the true ore of 
iron, may be of ufe to. diícover. new bodies or beds of ore. The 
“reduction of metals, or “reftoring t them totheit metalic flatefrom. 
their cajces, by combining them with the “inflammable Pinea 
pei in the application of charcoal, may fufficiently fhow the ef- 
' ficacy of the above thethod for the difcovery of the earth of iron 
in ghe. fubitences on Sinar the uo E e no Won? 
Avo" d 
