( W ) 
of different Natures ; for fbme makes CoUJhire-lrcn y thz\ 
is, (uch as is brittle, when it is cold ; another fort makes 
Red/hire, that is, fuch as is apt to break if it be ham- 
mered, when it is of a dark red Heat, and therefore are 
never melted down but in mixture, and fo they yield an 
indifferent good fort of Iron. They have of late made 
it much better than heretofore, by melting the Sow- 
metal over again, as likewife by ufing Turf and Char- 
coal, whereas formerly their Fuel was only Charcoal. 
They once made Trial of Pit-Coal, but with bad Sue- 
cefs. The fmall dufty part of their Charcoal is ufeful 
FoV burning the Iron-ftone; for every 17 Baskets of 
this burnt Stone they put in cne of Brimftone unburnt 
to make it melt freely, and cafl the Cinder. There is 
no other Cinder fwimming above but fuch like as this I 
fend you, only fometimes it is more vitrified than it 
is at other times. They always take it off from the 
melted Iron with a Coal rake at a hole in the Furnace- 
mouth before they let the Metal run. There is nothing 
remains in the bottom of the Hearth, all becomes either 
Iron or Cinder. 
The Furnace is built on the fide of an Hill, the bot- 
tom is about two yards fquare, and fo rifes perpendicu- 
lar for a yard or more, which is alfb lined within with 
a Wall of the beft Fire-ftone to keep off the force of 
the Fire from the Walls of the Furnace : The Bellows 
(which are very large, and played with Water) enter 
about the middle of the Focus. The reft of the Fur- 
nace is raifed upon this 6 or 7 yards fquare- wife, but 
tapering • fo that the fides draw towards each other by 
degrees, and the top-hole (where they throw in Baskets 
of Stone and Fewel) is but about I a yard fquare. Into 
this place they put down a Pole, to know how far it 
hath refted after a certain time ; and when they find it 
to have fubfided about a yard and \{ then they put in 
more, till the Furnace be full again. 
Thurnham. 
