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of excellent tin is (aid to be found in fome parts of Cornwall at 
the Sides and in the Channels of running Waters , which they 
call ....... 5 or whether the Ore be of a (after confidence, like 
Earth or Lome , as there is Lead-ore in Ireland holding ftore 
of Silver $ and Iron-ore in the North parts of Scotland and elle- 
where? And what is obfervable in it as to Weighty Colour,^ 
Mixture, &c ? 
50. Whether any part of the Metal be found in the Mine per- 
fed and complete 1 ? ( As I have had prefented me good val- 
uable Copper , and pieces ofperfed Lead , that were taken .up* 
the one at Jamaica , and the other by an acquaintance of mine, 
that took them out of the ground himfelf in New England . ) 
• 51. Whether the Mine affords any parcels of Metal, that 
feem to grow like Plants fas I have fometimes feen Silver grow- 
ing, as it feemed, out of Stone, or Sparre almoft like blades of 
Grafs 5 asalfc great Grains of a Metal , which appear'd to me, 
and which thofe ,; that tryed fome of it 5 affirmed to be Gold, 
abounding in a ftony lump , that feem’d to confift chiefly of a 
peculiar kind of Sparre . ) 
52. Whether the Vein lie near, or much beneath the fur- 
face of the Earth, and at what depth ? 
53. Whether the Vein have or have not any particular Con- 
comitants, or Coats f if I may fo call them$ ) and, if any , what 
they are , and in what order they lie ? f As the Veins of Lead- 
ore 5 with us, have frequently annnext to^ them a Subftance 
call’d Sparre z and next to that another, call’d .Caulk 
54. Whether ( befides thefe Coats ) the Vein have belon- 
ging to it any other Heterogeneous fubflance ? f As in Tin-mine's 
we often find that yellow fubflance which they call Mundick*) 
55. VVhat are the principal Qualities of thefe Extraneous 
fubftances ? f As that Sparre is white , but tranfparent , almoft 
like courfe Cryflall, heavy, bride, eafily divifible into 
flakes, &c* of a different texture, white, opacous , and 
like a'Stone , but much more ponderous. Mttndick, I have had 
of a fine golden colour $ but, though it be affirm’d to hold no 
Metal $ yet I found it in weight, and otherwife , to differ from 
Marchafites 5 and the Mine-men think it of a poifbnous na- 
ture. ) 
\%-z M Whe- 
