BRITISH ISLES. 37 



The E. and "W. veins contain tin, copper, iron gossan, and but little 

 lead. The N". and S. veins contain clay, and sometimes lead and iron ; 

 where the latter are lead-bearing, and are crossed by E. and W. veins, 

 the lead-ore becomes richer for silver, as at Treskerby Green, where 

 the galena yields 3000 ounces to the ton. C. E. DeR. 



Smyth, W. W. President's Address to the Eoyal Geological Society 

 of Cornwall, 1874. Ann. Bej). It Geol.Soc. Cornwall, pp. v-xiv. 

 Gives an account of Prof. Moissenet's work on The Rich Portions of 

 the Lodes of Conitvall. 



. On the Occurrence of Metallic Ores with Garnet Rock. Note 



illustrating a series of Copper Ores from Belstone Consols. Trans. 

 B. Oeol. Soc. Cornwall, vol. ix. part 1, pp. 38-45. 



Refers to cases in Cornwall where metallic ores have been found 

 associated with garnets. States that in various places on the N. side 

 of Dartmoor copper-ore occurs in the altered killas near its boundary 

 with the granite. Belstone Consols, the most important of the mines, 

 has been opened to a depth of 50 tathoms. There are 3 so-called 

 ' lodes ' striking E. and W. and dipping N. They consist of bands of 

 garnet-rock mostly crystalline, and containing disseminated copper- 

 pyrites, iron-pyrites, and mispickel, which sometimes coalesce into a 

 pretty solid rib, 1 to 3 inches thick, now and then associated with 

 quartz. The ' main lode,' measured horizontally, is 96 feet wide, and 

 is really nothing but a thick-bedded mass of garnet-ore, with various 

 ores of copper disseminated through it in specks and strings. The rock 

 between the lode consists of conformable beds of garnet rock and 

 siliceous slate. The whole series of ' lodes ' and ' country ' is merely a 

 group of conformable beds, probably metamorphosed under the influ- 

 ence of the neighbouring granite. Supposes that the ores were depo- 

 sited from mineral waters which made their way into the beds through 

 joints and fissures. C. L. N. P. 



Sorby, H. C. On the Remains of a Fossil Eorest in the Coal Mea- 

 sures at "Wadsley, near Sheffield. Quart. Journ. Geol. Soc. vol. 

 xxxi. pp. 458-460, 2 woodcuts. 

 The Sti(/marice are rooted in an earthy shale ; the Si(/illuria-tT\mks 

 are cut sharply off at the top of the shale, and are then overlain by 

 sandstone. About 10 stumps were exposed, spread over a/ length of 

 40 or 50 yards. Judging frcm the direction of the roots, the prevailing 

 winds came from the west. W. T. 



Stevens, Joseph. Sarsens, Greywethers, or Druid Stones. Journ, 

 Winchester Sci. Soc. vol. i. part 4, pp. 224-236. 



The same as the paper noticed in the Geological Record for 1874, 

 p. 35, but with large additions throughout, especially under the head 

 '* Distribution." W. W. 



Stevenson, W. On Evidences of Ice-action in Berwickshire. Proc, 



Berwick. Nat. Club, vol. vii. part 2, pp. 208-210. 

 Describes the distribution of boulders, the parent rocks of which lie 



