No. 75.] 



135 



SCAPOLITE. 

 (Mineralogy of New- York, page 329.) 



Imperfect crystals of scapolite have been found in Putnam Valley, 

 Putnam county, by Mr. Cyrus Fountain. 



In regard to the specimens heretofore described, I have to remark, 

 that some of those from Brush's, in Monroe, Orange county, resemble 

 the wernerite, from Franklin, N. J. They are in the form of small, 

 irregularly crystallized masses, and are imbedded in a reddish carbonate 

 of lime. I formerly supposed the mineral to be apatite. The following 

 notices may, also, be here introduced : 



The specimens from Fall Hill, in Orange county, melt into a darker 

 colored globule than any others which I have tried. They are asso- 

 ciated with a dark colored pyroxene, which will account for their larger 

 proportion of oxide of iron. 



Analysis has proved that the speciments of scapolite from Ticonde- 

 roga, in Essex county, are similar in composition to some of the foreign 

 ones, although the proportion of alkaline matter is larger. 



Nicol, in his Manual of Mineralogy, published during the present 

 year, describes nuttallite as a distinct species. A recent analysis made 

 in the laboratory of Prof. B. Silliman, Jr., confirms the statement made 

 in my report, of its identity with scapolite. The composition of a 

 specimen from Bolton, Mass., as thus determined, is as follows : 



Silica, 45-79 



Alumina, 30*11 



Peroxide of iron, 1-86 



Lime, 17*40 



Potash, 3-49 



Soda, 



Manganese, 



trace. 



Water, 1*63 



{Silliman' s Journal, Nov., 1849, p. 394.) 



100-28 



