15 S ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



species Krennerite, It occurs with sylvanite and petzite in 

 minute silver- white crystals, which have been thoroughly 

 described by Vom Rath. 



Coloradoite. Found with native gold and tellurium at 

 several mines in Boulder County, Col. It is, as described by 

 Dr. F. A. Genth, a telluride of mercury (IlgTe) analogous to 

 the long-known sulphide (cinnabar) and selenide of mercury 

 (tiemannite). It is found only massive, Avithout cleavage, 

 and has a metallic lustre and iron-black color. The specific 

 gravity is 8.627. 



Cryptocalltte. A new hydrous silicate of zinc and alumi- 

 num, described by Dr. G. E. Moore as occurring at the zinc- 

 mines of Franklin, N. J. 



Cuspidine. A lluo-silicate of calcium, described by Scac- 

 chi, who discovered it at Vesuvius. It appears in spear- 

 shaped crystals of a pale-red color. 



Dysanalyte. Found in cubical crystals in the granular 

 limestone of the Kaiserstuhl^ebir^e in Breisorau, where it 

 has long been known under the name of perofskite. Knop 

 finds it, on analysis, to be a columbo-titanate of iron, calcium, 

 cerium, and sodium, and separates it from allied species un- 

 der the name of dysanalyte. This name refers to the diffi- 

 culty involved in the chemical analysis of the mineral. 



Elroquite. A problematical phosphate of iron and alumi- 

 num, named by Professor Shepard. It occurs on the island 

 of Elroque, Caribbean Sea. It is massive, and has an apple- 

 green to gray color: the green color is attributed to chromi- 

 um in combination with phosphoric acid, and the compound 

 is called pliosphochromite. 



Enysite. Occurs in stalactitic forms, of a bluish-green col- 

 or, in a cave at St. Agnes, Cornwall. Its most prominent 

 constituents are copper, alumina, water, and sulphuric acid 

 (8 per cent.). It is supposed by Collins, the describer, to be 

 of comparatively recent origin. 



Ferrotellurite. Observed by Dr. Genth as a crystalline 

 coating on quartz, from the Keystone Mine, Colorado. Un- 

 der the microscope it is seen to consist of minute prismatic 

 crystals of a yellow color. In composition it is probably a 

 tellurate of iron. 



Franhlandite. A hydrous borate of sodium and calcium, 

 found with ulexite at Tarapaca, Peru. Described by Profess- 

 or J. Emerson Reynolds. 



