

oda of 



^ 



lN '°ts est 



■Preset 



g numer 



a Me), fr 



rset, 



rr numem 



e 



We* 



rater & 



ffeiiijfc 



iron], 

 rset 



>n 



ly kD^' 



5^A 



►per 



#: 



J* 



, 





AND IRON ORES. 



91 



from loiver beds of the Coal Measu 



•North 



of Oldbury, near Dudley, Worcestershire. 



170.— Nodules, forming septaria, and containing iron 

 pyrites. From the walls of a copper lode, 30 fathoms from 



Upper 

 Gallery 



Wall-case 43 



the surface, at North 



Friendsh 



Devon. 



171, 



Tavistock, 



172. 



Hill, Wilts 



from Loivi 



fi 



Green- Sand, occurring 



7 O 



abundantly on the surface of the ground at Shotover, near 



Oxfi 



173. — Iron ore, locally 



fi 



re from 4 Lower Silurian Lingula beds. — Bettws Garmon, Llanberis, 



?ndip HI 

 tie Dow' 



Caernarvonshire. 



174 



Stalactitic brown iron ore, with a fibrous struc- 



ture, from Old Red Sandstone. 



Hi 



set. (Map 

 KC.B. 



Presented by Sir Charles E. Trevelyan, 



Brown iron ore consists of peroxide of iron 85 • 3, and 

 water 14*7, with occasional impurities, as silica, alumina. 

 175 — Botryoidal brown iron ore, with a fibrous struc- 



, and _^v 



Old Red Sandstone. — Brendon Hill Mine 



From 

 Pre- 



176. 



K 



MANGAN 



appearance on the outer surface. From Old Red Sand- 

 Somerset. Presented by Sir 



stone. 



Hill Mine 



Charles E. Trevelyan, K.C.B. 



This ore is composed of oxide of manganese 68-0, oxide 



of iron 6 '5, water 17 '5, carbon 1*0, baryta l'O, and silica 

 8-0. 



