282 ANNUAL HECOKD OF SCIENCE AND INDUSTRY. 



ganese, with a small amount of iron. It occurs in prismatic 

 crystals belonging to the orthorhombic system, and showing 

 a perfect macrodiagonal cleavage ; it is also more commonly 

 massive, sometimes closely compact. The characteristic color 

 is bright pink, but in the massive forms it is also grayish and 

 yellowish white and white; the lustre is sub-resinous. It is 

 closely related in crystalline form to childrenite, and has also 

 a nearly analogous chemical composition. Found with oth- 

 er manganese phosphates at Branchville, Fairfield County, 

 Conn. ; described by G. J. Brush and E. S. Dana. 



Fucrasite. A hydrous silicate containing principally tho- 

 rium ; but also cerium, lanthanum (didymium), yttrium, er- 

 bium, besides small quantities of other less rare elements. 

 The color of the mineral is black-brown; the lustre is greasy, 

 and in splinters it is slightly translucent. From Barkevik, 

 Norway ; described by S. II. Paikull. 



Fairfieldite. A hydrous phosphate of manganese and cal- 

 cium, containing also small quantities of iron and sodium. It 

 is a yellowish-white to colorless transparent mineral, with an 

 adamantine lustre on the surface of best cleavage : the hard- 

 ness is 3.5, and the specific gravity is 3.15. From Branch- 

 ville, Fairfield County, Conn. ; described by G. J. Brush and 

 E. S. Dana. 



Freyalite. A hydrous silicate containing principally ceri- 

 um and thorium; also lanthanum (and didymium), alumini- 

 um (and zirconium). The color is brown, and the lustre res- 

 inous ; it resembles some varieties of thorite. The specific 

 gravity is 4.1. From the region of Brevig, Norway; discov- 

 ered by Esmark, and described by Damour. 



Fnseite. A sulphide of silver and iron, very closely similar 

 to sternbergite in crystalline form and physical characters as 

 well as composition. These two minerals, with argentopyrite 

 and argyropyrite (described above), form a group of very 

 nearly related minerals. From the Joachimsthal, in Bohemia ; 

 described by C. Vrba. 



Galenobismutite. A sulpho-bismutite of lead, related in 

 composition to zinkenite. It occurs massive, with a black 

 color and metallic lustre. From Nordmark, in Wermland ; 

 described by II. Sjogren. 



Ganomalite. A silicate of lead, manganese, calcium, and 

 magnesium. It is colorless to whitish-gray ; it lias a greasy 



