76 On Hircine, a new Resin. [No. 1. 



ore of 15£ Marcs* to the Caxon (of 5000 lbs. Adv.) so that it will be 

 seen, referring to what I have already stated in my former paper, that 

 this is far above an average ore. In practice, however, on the large 

 scale, as all the silver is not extracted, it would rank something lower. 

 It is perfectly impossible to say what this ore at the surface may be 

 the indication of; but assuredly, for any thing we know, or I fear are 

 likely to know for years to come, we may have a whole Mexico within 

 our reach, though now buried amongst the forests and beneath the 

 rocks of Birbhoom. 



On Hircine, a new Resin, by Henry Piddington ; Curator, 

 Museum of Economic Geology. 



1 . I have not ventured yet to announce this as a new mineral Resin, 

 though I think it may be so. It was placed in my hands by Mr. 

 Theobald, Senior, with a request that I would examine it. Mr. Theo- 

 bald has not yet been at liberty to furnish me with any memoranda 

 regarding its locality, but expects soon to be able to do so. 



It should be observed that we had only a small lump of it weighing 

 barely an ounce Troy ; and it was of course desirable to keep as much 

 of this as possible for a Museum specimen.-)* 



2. This resin is brown on the external parts and of a very brown 

 yellow colour internally. 



3. It is generally opaque, but is slightly translucent at the edges. 



4. It is tough to break, and very tough and elastic, leaping out of 

 the mortar if not covered up, while pounding. 



5. Its fracture is hackly in small pieces, but conchoidal in the large. 



6. Its specific gravity is 1. 10, but if freed from the external rough 

 coat, which could not be completely divested of air bubbles, it would 

 probably be 1.2 or thereabouts. 



* The Spanish Marc is 3550£ grs. troy. 



f Persons desiring to have specimens chemically examined should always remem- 

 ber that it is far better to send large specimens than small ones, on very many 

 accounts. To a Museum they cannot send them too large or too numerous in 

 kind, variety, matrix of ores, &c. 



