188 



buted over certain parts of Cumberland and Westmorland. It 

 usually occurs in very small, wedge shaped, crystals, somewhat 

 lustrous, and of a pale-brown colour, interspersed, sometimes 

 plentifully, amongst the ordinary constituents of the granite 

 mentioned. 



MOLYBDATES. 



In one of the gills running up from the Cawda to the west 

 side of the summit of Carrick, several small mines have been 

 opened out with a view to obtaining copper and lead. Various 

 ores of both these metals occur amongst the fault-breccia ; though 

 miners have every reason to be impressed with the fact that 

 variety is a more prominent feature connected with the minerals 

 than is the abundance of any particular species of economic value. 

 Amongst the various decomposition-products arising from the long 

 exposure of the mineral veins of this part to the action of meteoric 

 causes is one that I believe to be Wulfenite. Its occurrence at 

 the locality referred to was noted in the Geol. Mag. Dec. I. Vol. I. 

 p. 565. The mineral occurs in small and very thin prisms, like 

 small scales, and is of a bright vitreous lustre and of an 

 orange colour. It occurs coating the rider, along with macles of 

 Cerussite, with Anglesite, and with various other mineral species 

 of more or less interest. 



TUNGSTATES. > 



Wolfram, Manganese-and Iron Tungstate, occurs chiefly at 

 Brandy Gill in the quartz vein-stuff traversing the granite there. 

 It is found also at Godolfin Ball, and at Lockfells. The Brandy 

 Gill specimens do not differ in any noticeable respect from the 

 specimens obtained in connection with Tinstone in Cornwall. 

 The proportion of Iron Tungstate to Manganese Tungstate varies 

 considerably in specimens from different localities. It is as 2:3 

 at Lockfells, and as 4 : i at Godolfin Ball, according to Dana 

 {Mineral. 5th ed. p. 603). Wolfram is used in the manufacture 

 C)f tungstate of soda, which is employed as a mordant, and for 

 rendering light dress-fabrics inflammable, as well as for hardening 



