OF SEVERAL MINERALS. 
101 
Shelf III. 
145. Galena, with Calcareous 
Spar. 
A portion of the Hero Lode, Glen- 
dasane, Co. Wicklow, Ireland. 
Contributed by the Irish Geological 
Survey. 
146. Lead Vein, with Toad- 
stone Wall attached. 
High Rake deep shaft, TidesweJl, 
Derbyshire, 1850. 
This specimen offers interest as being 
an exception to the rule commonly re¬ 
ceived in Derbyshire that the veins die 
away in, or are cut out by the Toadstone. 
147. Galena, with Sulphate of 
Baryta. 
Great copper deposit, Eclon, 
Staffordshire. 
148. Galena, occurring in spots 
or “ blanches ” in Fluor Spar. 
Smittergill Head, Aldstone, Cum¬ 
berland. 
149. Sulphide of Silver, and 
Quartz, illustrating the tilling up 
of the vein. 
Schemnitz, Hungary. 
150 & 151. Branch of Copper 
Ore, traversing Slate. These 
specimens show that the cavity 
containing the branch was first 
lined by quartz on one side, and 
clayey matter and quartz on the 
other, before Copper Ore was in¬ 
troduced into the fissure. 
JMieal Fortune, Marazion, Corn- 
wcdl. 
Presented by Sir H. T. De la Beehe. 
152. Branch of Copper Ore, 
traversing Slate. 
Huel Fortune, Marazion, Corn¬ 
wall. 
Presented by Sir H. T. De la Beche. 
Shelf lY. 
153. Tin Ore. 
Wheal Vor, Breagiie, Cornwall. 
Presented by John Sylvester. 
154. Galena, the crystals on 
one side covered with Quartz. 
Nant-y-Creiau Lead Mine. 
Presented by li. Bincks. 
155. Barytes and Galena, en¬ 
crusting Calc Spar. 
Crich Mines, Derbyshire. 
156. Radiated Barytes and 
Green Fluor. 
Trehane Mine, near Liskeard, 
Cornwall. 
157. Crystalline Gothite, or 
Hydrous Peroxide of Iron, depo¬ 
sited on Red Peroxide of Iron, and 
overlaid by crystallized Quartz, 
forming a “ vug ” or cavern. 
Restormel Royal Iron Mine, Lost- 
withiel, Cornivall. 
158. Crystals of Gothite, in¬ 
vested with Quartz. An example 
of entire coating by a crystalline 
film of a newer mineral. 
Resto)'mel Royal Iron Mine, Corn¬ 
wall. 
158a. Galcite, in white sheaf¬ 
like groups of crystals, attached to 
Iron Pyrites in pseudomorphous 
incrustations. 
Liskeard, Cornwall. 
Shelf Y. 
159. Blende, variety ‘‘Black 
Jack,” crystallized on Quartz. 
Old Hagg’s Vein, Aldstone Moor, 
Cumberland. 
160. Tabular crystals of Ba¬ 
rytes, partially encrusted with 
cubic crystals or Iron Pyrites. 
E. Cornwall. 
161. Octohedral crystals of 
Galena, partially covered with 
crystallized Quartz. 
Aldstone, Cumberland. 
162. Crystals of Copper Py¬ 
rites on Quartz. 
Cornwall. 
163. Fluor Spar, with crystals 
of Galena, superficially decom¬ 
posed. 
Durham. 
