201 



where the horses, mules and oxen belonging to the Navy Yard are 

 pastured. " The companionship of all these animals forms an essen- 

 tial element in taming and domesticating the Llama, Vicuna, and 

 Alpaca." 



This request has been complied with by the Secretary of the Navy. 



Mr. A. E. Verrill exhibited specimens of Zircon and Corundum 

 from Greenwood, Me. The latter was a hexagonal crystal, one and 

 three quarter inches in length, and an inch in diameter. It occurred 

 with others of similar and larger size in a micaceous schist. The' 

 Zircon is found in small crystals of a brownish red color and brilliant 

 lustre, imbedded in albite. It seems worthy of remark that tin ore 

 (Cassiterite) has now been found at three localities in Oxford Co., 

 Maine, in similar situations ; in each case in a vein consisting in great 

 part of albite, passing through granite ; and, in two of the localities at 

 least, it is intimately associated with these small crystals of Zircon, 

 both often being seen in the same specimen. At the locality in 

 Greenwood that he had discovered a few years ago, the associated 

 minerals were Zircon, Pyrochlore and Magnetite, all in small crystals 

 like the tin ore itself. At Mt. Mica, in Paris, so well known for its 

 rare minerals, he had found the ore in 1854 in a mass weighing about 

 five pounds, and also in small crystals. Specimens from this locality 

 had already been exhibited to the Society. At this place the princi- 

 pal associated minerals are the red, green, blue and black Tourma- 

 lines, Lepidolite in large masses. Mica, Beryl, Amblygonite, Yttrocer- 

 ite, Brookite and Zircon. Of these the last three have not been before 

 recorded. The Amblygonite was found during the past year by 

 Prof G. J. Brush, of New Haven. These all occur disseminated 

 through a wide vein of albite and feldspar, with some other more 

 common minerals. 



In Hebron, about eight miles from this locality, there is another 

 vein containing nearly the same minerals, except perhaps the last 

 three, which have not yet been noticed ; and, in addition, Mispickel.* 

 Tin ore was found here by Prof. Brush in small crystals. These locali- 

 ties will perhaps serve as an indication of the manner in which this 

 ore may occur at other places in New England. 



Dr. Stephen Reed, of Pittsfield, and Mr. B. D. Walsh, 

 of Rock Island, Illinois, were elected Corresponding 

 Members. 



President Thomas Hill, of Harvard University, Messrs. 



* The mineral mentioned in these Proceeding's, Vol, vii. p. 423, as probably 

 Native Arsenic from Greenwood, Me., has recently been analyzed by Mr. G. H 

 Emerson, of Cambridge, and found to be a massive variety of Mispickel. 



