57 



Allanite. Franklin, New Jersey. (In the Feldspar of an old Mag- 

 netic Iron Mine, this mineral abounds in small, flat prisms of con- 

 siderable length. The mineral was found at this locality by Dr. 

 Charles T. Jackson. I must here take the liberty of offering 

 my sincere thanks and grateful acknowledgments to the author 

 of the following investigation, T. Sterry Hunt, Chemist to the 

 Geological Survey of Canada, who has given its publication to 

 my charge.) 

 Specific gravity 3.84. Partially decomposed by heated hydrochloric 

 acid, with separation of flocculent silica. Gave on analysis : — 



Silica 30.20 



Alumina 13. 05 



Iron Sesquioxide - - - - - 18.25 



Ceric Oxide 16.60 



Lanthanum Protoxide - - - - - 6.90 



Lime 11.76 



Magnesia - - - - - - - 1.70 



Manganese ------- traces 



Volatile Matter 1.30 



The oxyd of Lanthanum, removed by very dilute nitric acid from 

 the calcined cerium oxyd, probably contained some Didymium. The 

 iron, in part at least, exists as protoxvd in the mineral.* 



T. S. H. 



Easton, Northampton Co., Pa. (Edward Swift, M. D., has 



informed me of his having found a specimen of this mineral on 

 the surface of a field near Easton.) 



Cerine. Riddarhyttan, Mines of St. Gorans. Hisinger, Afh. i 

 Fys. och. Kemi, iv. 327. 



Bastntis. Hisinger. 



Orthite. Iglorsoit. 



Finbo, near Fahlun, Sweden. Berzelius. 



Skeppsholm. 



Lindeniis, Norway. 



Miask in the Ural. Rammelsberg. 



Fille-Fjeld. Scheerer. 



Wescio, Sweden. Blomstrand, Ofv. Akad. Handl, 1854, p. 



296 ; J. pour. Chem. lxvi. p. 156. 



Arendal. Zettel, Ann. Ch. u. Pharm. cxii. p. 85. 



Suontaka, Finland. Mendeljef, Jahresbericht Forts, pharm. 



u. tech. Chemie, Physik, Mn. u. Geol. 1858 ; p. 703. 



Weinheim. near Stiflft, Leonh. u. Bronn, Jahrb. Min. 



1856, p. 395. 



* It will be made a point of inquiry, during the course of these investigations, tc 

 determine the state of oxidation in which the iron exists in these minerals. W. S 



