NOTES ON THE MINERALS FOUND NEAR BRISTOL. '] I 



Specimens are in reniform masses^ or else as specular lancet-shaped 

 crystals. A.s the name denotes, a Uood red colour is produced 

 when the hard ore is scratched by a piece of some hard substance. 

 While the Gothite, and other kinds of hjdrated ferric oxide, give a 

 yellowish brown streak. Almost all the Bristol Haematite has 

 mixed with it a large per centage of Silica, probably derived from 

 its propinquity to the upper and millstone grits. This lowers its 

 money value in the market, because it produces what is technically 

 called " short iron." 



It is difficult to arrive at a correct average value of the Bristol 

 ore, because it varies so widely in the percentage of worthless 

 constituents. 



The following analysis chosen from a large number, perhaps, 

 will give a fair idea of metallic iron afforded from the Haematite 

 from various localities : — 



Iron ... 52.63 ... 50.40 ... 58.9 

 A picked specimen of reniform Haematite, gave : — 



88.23 



Ferric oxide 

 Silica 

 Moisture, &c. 



2.06 

 9.71 



TOO. 00 



Iron 



61.76 



