INDUSTRIAL PROGRESS DURING THE YEAR 1876. Ixxxvii 



Adervielle, Hautes-Pyren6es. Named by M. Bertmnd in honor of 

 M. Friedel. 



Gastaldite.A. member of the amphibole group of minerals, but 

 in composition essentially a silicate of aluminum. Found in chloritic 

 slate in the valley of Aosta ; occurs in prismatic crystals ; color, dark- 

 blue. Named by Sr. Strilver in honor of Sr. Gastaldi. 



Hermannolite. A mineral very near if not identical with colum- 

 bite, from the old locality at Haddam, Conn. Supposed to differ in 

 chemical composition. 



Huantajayite. A chloride of sodium and silver, allied to halite 

 and cerargyrite. Crystallizes in cubes of a white color. From the 

 mine of San Simon, Cerro de Huantajaya, Chili. 



Ilydrotitanite. A mineral which has been produced by the altera- 

 tion of crystals of perofskite; all the lime and some of the iron 

 having been removed, and water been taken up. The crystals have 

 retained their original form, but the color has become grayish white. 

 Locality, Magnet Cove, Arkansas. Described by Dr. Koenig, of Phil- 

 adelphia. 



IJdeite. A hydrous sulphate of iron ; occurs as a yellow efflores- 

 cence on the graphite of Mugrau, Bohemia. 



Keatingine. A variety of fowlerite, from Franklin, N. J. 



Kronhite. A double sulphate of copper and sodium, of a brilliant 

 blue color; and occurring in crystalline masses having a prismatic 

 structure. It feels moist to the touch, and upon prolonged exposure 

 to the air it becomes greenish, and partly loses its transjDarency. 

 From the mines of Calama, in Bolivia. 



Leviglianite. A ferriferous variety of guadalcazarite, from Levi- 

 gliani, Italy. 



Malinoicshite. A variety of tetrahedrite, containing considerable 

 silver and lead. From the mine of Car pa, Peru. 



MelanoiMogite. Occurs in minute cubes, having a light brownish 

 color, which are implanted on calcite and celestite from Sicily. The 

 mineral contains silica, sulphuric oxide, and water, though the ex- 

 act composition is yet doubtful. The hardness is nearly that of quartz. 

 Its most peculiar character, to which it owes its name, is that it turns 

 black on being heated. 



Microschorlite and Microvermiculite are names given l^y Herold to 

 microscopic crystals, of uncertain nature, observed in the kaolin of 

 Thuringia. 



Mottramite. A hydrous vanadate of copper and lead, occurring as 

 a black, velvety incrustation on sandstone. At JMottram St. An- 

 drew's, Cheshire, England. Described by Professor Roscoe. 



Paranl'erite. A name given by Boricky to a special group of the 

 minerals which are embraced under the general term of aiiTcerite; 

 that is, carbonates of calcium, magnesium, and iron, in varying pro- 

 portions. From Bohemia. 



