MINEKALOGY. 549 



of the rare metals cerium, lanthanum, didymlum, thorium; also iron, 

 lime, soda, &c. 



TalMripUte. — A phosphate of iron and manganese protoxides, of lime 

 and magnesia, perhaps to be regarded as a tripKte, peculiar in contain- 

 ing lime and magnesia. It occurs in small transparent grains of a yel- 

 low or yellowish-red color, together with lazulite, svanbergite, and other 

 phosphates, at the Horrsjoberg, in Wermland, Sweden. Described by L. 

 I. Igelstrom. 



Tritochorite. — A vanadate of lead, copper, and zinc, related to eusyn- 

 chite, described by Frenzel as from Mexico or South America. It is a 

 massive mineral, with fibrous-columnar structure, and blackish or yel- 

 lowish-brown color. 



Tyreeite. — A name given by Heddle to the soluble portion (in sul- 

 phuric acid) of a small amount of red mud obtained as a residue after 

 dissolving 150 pounds of the carnelian marble of Tyree, Scotland, in 

 hydrochloric acid. The author has given many names to bad minerals, 

 but this is the worst case of all. 



Uranopilite. — According to Weisbach a hydrous silicate of lime and 

 uranium, forming a lemon-yellow ocherous substance, at Johanngeorgen- 

 stadt, Saxony. The material analyzed was so impure that the existence 

 of a new mineral is yet to be proved. 



UranoilialUie. — A hydrous carbonate of uranium and lime, occurring 

 in confused aggregates of siskin-green color at Joachimsthal ; the form, 

 according to Schrauf, approximates to that of aragonite. The same 

 mineral was earlier analyzed by Lindacker and partially described by 

 Vogl. 



Uranothorite. — A variety of thorite remarkable as containing 10 per 

 cent, of uranium oxide. The single specimen found was massive, had a 

 dark-red color, aM resinous to subvitreous luster. It is described by 

 P. Collier as from the Champlain iron region of 'New York, but the exact 

 locality is unknown. 



ZiNOAirUMiNiTE. — A mineral occurring in thin hexagonal plates of 

 a white or slightly bluish color. It is a hydrous sulphate of zinc and 

 alumina. It is described by Bertrand and Damour from the zinc mines 

 of Laurium, Greece. 



