( 34 *) 
any Recrements ? (As Iron-flow affords (lore of a dark Ckfs 
or Slagg ) And, if it do, what thofe Recrements are? How 
they are feparated from the Metal: j and to what Ufes they are 
employed ? j- ' • . 
90. Whether , after the Metal has been once melted , the 
remaining part of the Ore being expofed to the Air , will in 
trad of time be impregnated, or ripen’d, fo as to afford more 
Metal? ('For, this is affirm'd to me of the Cornijh Tin-Ore, 
and what remained after the fufion of Iron-ore in the Forefl of 
Dean ^ is fo rich in Metal, that a Tenant of mine in Ireland, 
though he had on the Land , he held from me , an Iron-Mine, 
found it lets profit to work it , than to fend crofs the Sea to the 
Forefl of Dean for this already us’d Ore , which having iain for 
*fbme ages , fince it was thrown afide in great heaps expos’d to 
the Air , he affirm’d to yield as well great great ftore of Iron, 
as very good ; though I fomewhat doubt , whether this be to- 
tally to be afcribed to the Aire , and length of time, or to the 
leaving of Metal in the Slaggs in old .times , before great Fur- 
naces were in ufe . ) - ... . 
P romifcuom Inquiries about Mines , from the 
fame Author. 
1. Whether the Territorie, that bears the Mine, abounds 
with no other Kind of Mineral in fome did ind part of it ? ( As 
in Kent near Tunbridge , one part of the Country which is Hilly, 
abounds all along with Iron-Mines 5 the other , which is alio 
Hilly , and divided from it but by a fmall Valley , abounds ex- 
ceedingly ( as the Diggers and Inhabitants told me upon the 
place ) in Quarry s , which the Metallin-Country wants, but is 
quite deftitute pf Iron-done. And fo at Mendip , in one part 
of the Hill , I iaw ftore of Lead-Mines , containing feveral 
Kinds of Ore of that Metal 5 another part of the Hill I found to 
be .full of Cole-pits , which had fome Marchafltes , but no Metal , 
and in another place , Iron-ore , and mixt with Ores, which 
yet they did not think fit to work. J 
2. Whether the Air appear to be really cold in Summer, 
and 
