Mr. William Phillips on the OxydofTm. 345 



accompanied by calcedony from Pednandrae. In searching the 

 heaps of that mine for the chlorophane, I found several varieties 

 of remarkably compact fluor * — also enclosing crystals of oxyd 

 of tin, or accompanied by them. 



In Yellow Copper Ore — imbedded with it — coated with yellow cop- 

 per ore, and accompanied by chlorite — with yellow copper ore 

 on micaceous schistus — with yellow copper ore^ quartz, and 

 chlorite, from Huel Fanny. 



With Blende on quartz, from St. Agness. 



In Mispickel — with mispickel on schist. 



In Wolfram — with wolfram and dark brown gossan — with wolfram 

 and chlorite from Pednandrae mine — ^with the primitive crysta 

 of wolfram, mispickel and yellow copper ore, from Huel Fanny. 



The science of mineralogy is so intimately connected with some 

 branches of the mathematics, that he who pretends to the former, 

 unassisted by a knowledge of the latter, may perhaps be considered 

 as pursuing it rather as an amusement, than as an object of scientific 

 research. I confess myself to be exactly so circumstanced. The 

 want of an attachment to the study of the mathematics, led me to 



traversed in various directions by minute veins of chlorite, occasionally imbedding 

 yellow copper ore and oxyd of (in. It is hard; scratches glass easily; its fracture is 

 shattery and splintery. Its general colour is purplish ; it is transparent at the edges, 

 and the fragments arc very transparent ; a thin piece held for a short time in the flame 

 of a candle, emits a brilliant green light, which becomes very brilliant by placing it on 

 a live coal, from which, if it be taken at about the height of its light, it may bp 

 repeated, though with diminished effect; by frequent repetition it becomes nearly 

 colourless. It does not fly even in the centre of a common fire. 



*'Some of these fluors deserve particular notice on account of their exhibiting some 

 peculiar characteristic diflerences when compared with common fluor. One large spe- 

 cimen is of a bluish colour, and is traversed in various directions by veins of what I 



Vol. II. 2x 



