SUCCESSION OF MINERALS. 
lO*? 
Wall-case 30. 
Shelf I. 
253. Part of a Copper Lode 
or Vein, exhibiting the structure 
termed combj.” 
Consols Mine, G/vennap, Cornwall. 
Presented by Sir H. T. De la Beche. 
254. Parallel ribs of Galena, 
Quartz, and Carbonate of Iron. 
Helston, Cornwall. 
255. Pibs of Carbonate of Iron, 
Chlorite, Quartz, and Copper Py¬ 
rites. 
Cornwall. 
Examples of the Attachjient 
CERTAIN sides ONLY OF 
Shelf II. 
259. Magnificent crystals of 
Galena, or Sulphide of Lead, 
partially encrusted with Quartz 
crystals. 
Basore Mine, Parish of Kenwyn, 
Cornwall. 
260. Fluor Spar, Calcareous 
Spar, Quartz, Pearl Spar, and . 
Galena. 
Durham. 
261. Cubes of Fluor, coated on 
certain sides only with Siderite, or 
Carbonate of Iron. 
Henry’s Vein, Allenheads, Nor¬ 
thumberland. 
262. Crystallized Galena and 
Calcareous Spar. 
Lisburne Mines, Aberysiwiih, 
Cardiganshire, 
Presented by the late Captain Eddy, 
263. Specimen from a “ vug ” or 
hollow in a Copper Lode. Crys¬ 
tallized Copper Pyrites occurs 
on one side of a set of Quartz 
crystals, and Iron Pyrites on the 
other, showing that some force so 
governed their relative positions 
that they were formed in distinct 
directions. 
Consols Mine, Gwennap, Cornwall. 
Presented by K. W. Fox, F.R.S. 
256. Veins of Blende, Carbonate 
of Iron, and Iron Pyrites. 
Llyn-y-Parch, Bettws-y-Coed, 
Caernarvonshire. 
257. Carbonate of Iron, oc¬ 
curring in a layer parallel to the 
wall of a Copper Lode. 
Wheal Tolgus, Bedruth, Cornwall. 
Presented by John Michell. 
258. Rhombohedral crystals of 
Carbonate of Lime, and lenticu¬ 
lar crystals of Carbonate of Iron 
sprinkled with Iron Pyrites, on 
crystallized Quartz, de^iosited upon 
cubic crystals, which have been 
removed by natural process,leaving 
their impressions. 
Tamar Mines, Devon. 
F NEWER DEPOSITED MINERALS TO 
PRIOR FORMED CRYSTALS. 
264. Cube of Fluor Spar, with 
Quartz on one face, and Calc Spar 
on the others. 
Aldstone, Cumberland. 
265. Cubes of Fluor, encrusted 
on certain sides only with Quartz 
and Zinc Blende. 
Aldstone, Cumberland. 
266. Galena and crystallized 
Calc Spar. 
Ticknall, Leicestershire. 
The sulphide of lead on one side of 
this plate is quite bare, on the other 
covered with crystals of Calcite. 
267. Quartz, sprinkled on one 
side only with Crystals of Galena 
and Pearl Spar. 
Tamar Silver Lead Mines, Devon¬ 
shire. 
Shelf III. 
268. Iron Pyrites and Car¬ 
bonate of Iron. 
Virtuous Lady Mine, Devon. 
269. Fahlerz, Galena, and 
Quartz pseudomorphous after 
Barytes ; the crystals of Fahlerz 
(tetrahedrite) gilded as it were 
with Copper Pyrites, may be ob¬ 
served to be almost confined to one 
side of the large tabular crystals. 
lAskeard, Cornwall. 
