ON THE DETRITAL TIN-ORE OF CORNWALL. 251 
Jews'-house-tin has been found in many parts of the western 
and central districts ; but under various conditions, and in masses 
of unequal weight ; 
LOCALITIES. WEIGHTS. AUTHORITIES. 
WESTERN DISTRICT. 
Saint Just .......... 5°O0lbs. Avoir. Carne, Cornwall Geol: Trans: 
P li, p. 293 .* 
non00600 ORO) - . 1 ; 
Madeon (Bossuliack) . Re ee Lane Cor fe Geol: 
‘3 Trereife...... ; 26:00 9 Gots Sure DE est 
a Tremethick .. 38°00 5 Whitley (H.M.), Journal of the 
Royal Inst: of Cornwall, 
No, Xili, p. XxXviii.§ 
WESTERN-CENTRAL DISTRICT. 
Gwinear .orsccersesee 31:00 A Carne, Cornwall Geol: Trans: 
ii, p. 293. Le Grice, Jbid, 
vi, p. 44.|| 
Constantine.. ...--.. 3:90 na Mr. Hunt, F.R.S., Keeper of 
Mining Recordsin the Royal 
School of Mines MS.7 
Manaccan’.....0..+0e. 0°47 50) Professor Tennant, F.G.S.; 
and Mr. Thomas Davies, 
F.G.S.; MS.+** 
af WOOP Goacco a fragment. Myr. Rogers, of Penrose, 
MS. ++ 
Saint Martin Meneage.. 1:25 “ Dr. Jago, F.R.S., President of 
the Royal Institution of 
Cornwall MS.++ 
* Ante, p. 193, Note +. There may be some uncertainty whether this 
_is not the first specimen referred to by Mr. Le Grice. Cornwall Geol: Trans: 
vi, p. 44. 
+ Ante, p. 193. 
{ This specimen was presented by Mr. le Grice to the Penzance 
Naturat History Society, Cornwall Geol: Trans: vi, p. 45. Ante, p. 193. 
§ Ante, p. 193. 
|| Ante p. 199, Note +. 
‘ The largest [mass] I have heard of weighed 34lbs., it was found in a 
“ hedge in the parish of Gwinear, and having been offered for sale at the 
“* Angarrack Smelting House, the Goth of a refiner put it at once into a ladle 
“and melted it down.” Lr Gricz, Cornwall Geol: Trans: vi, p. 44. 
q This specimen is preserved i in the Museum of Practical Geology, 
Jermyn Street, London. 
** This specimen is in the British Museum. 
{+ ‘(A small fragment of very imperfectly smelted tin,—supposed to be 
“ Jews’-tin—was discovered on Manaccan-moor by Mr. R. J. Cunnack who 
“presented it to me. It was found in connection with fragments of what 
‘had every appearance of slag.” Mr. Rogers, MS. 
tt This specimen is preserved in the Museum of the Royal Institution 
of Cornwall. Ante, p. 203, Note. 
F 
