61 



TAB. CXXXIIL 



FERRUM oxygenizatum. 

 Wood-like Iron Ore. 



Class 3. Metals. Order 1 . Homogeneous. 



Gen. 8. Iron. Spec. 3. Oxide of. 



Div, 2. Imitative. Far. Wood-like. 



Charles Jos. Harford, Esq., was so good as to bring 

 the specimen from which this figure was taken, from 

 Bristol. It was found in a ploughed field in that neigh- 

 bourhood. It is of that variety often called Wood-like 

 Iron Ore, and much resembles Wood-like Tin Ore. It 

 however is much lighter and softer, and much larger than 

 Wood-Tin has ever been found. Its weight is about 7lb., and 

 its diameter about 6 inches by 5 inches. The figure being 

 smaller, the many centres from which the radii form give 

 it a pretty variegated appearance, and the radii are relieved 

 by the darker tints of the striae which are least ochry. The 

 circles are so regular in some parts as to appear rather 

 forced in the drawing : it may, however, be safely said that 

 they are not more regular in the drawing than in the 

 specimen. It may be curious to observe how reciprocal the 

 force of formation is in this specimen, as each centre has 

 terminated its radii with as little disturbance to its neigh- 

 bour as possible. The primitive crystal of Oxide of Iron is 

 not yet known; whatever it is, it must have some affinity to 

 the Galena— tab. 13.1. 8 



