

ISLE OF MAN. MINERAL VEINS. 579 



head, and in other places, in small quantities ; and being 

 sometimes minutely crystallized, has been mistaken for 

 garnets. Specimens of it were brouglp to me under 

 this title. ' 



Common clay ironstone is found sparingly among the 

 beds of clay, in the neighbourhood of Castletown and 

 elsewhere; but it is not entitled to any further notice. 

 Bog iron ore is also to be observed on the surface 

 of the alluvial soil in several places, but, like the former, 

 it requires no further description, 



I have already mentioned that a red argillaceous iron- 

 stone is seen in the neighbourhood of the sandstone 

 near Peel; and I may add to this, that yellow ochre 

 has been found in sufficient quantity in some of the 

 mineral veins, to have become at one time a matter 

 of export. It is further probable that this ochre was 

 at times mixed with a considerable proportion of de- 

 composed sulphate of copper, since it appears by the 

 mining reports, that copper was obtained in the furnaces 

 from a brown powder which was found in considerable 

 abundance. The mines having long since ceased to 

 be wrought, no specimens of this substance can now 

 be procured so as to permit its true nature to be as- 

 certained. 



Such is the list of the detached or independent minerals 

 appertaining to this island, which either fell under my 

 own observation, or concerning which I could procure 

 authentic evidence ; and with that list I shall now close 

 this account of the geology of Man. 



THE END. 



KS, GRKVIEEE STREET, LONDON, 



