MINERALOGY. 159 



Ginilsite. A name given by Rammelsberg to a massive 

 mineral from the Ginilsalp in Graubiinden, Switzerland. Its 

 color is grayish-yellow, and its most prominent constituents 

 are silica, lime, and iron, together with smaller amounts of 

 alumina and magnesia, and 3 per cent, of water. 



Guanaj uat ite. The mineral fremelite, mentioned in the 

 Record for 1876, was described under the name of guanajua- 

 tite by Professor Fernandez in 1873, and the latter name has 

 consequently the prior claim. 



Haddamite. A mineral occurring imbedded in the Had- 

 dam columbite, and believed by Shepard to be distinct from 

 microlite. 



Hcitchettolite. A name given by Dr. J. Lawrence Smith to 

 a mineral occurring in regular octahedrons with the samar- 

 skite of Mitchell County, N. C. It has a yellowish-brown 

 color and resinous lustre. Analyses by Dr. Smith, and a 

 later and more complete analysis by Professor O. D. Allen, 

 show the mineral to be essentially a tantalo-columbate of 

 uranium and calcium, containing also some water, iron, and 

 less than 2 per cent, of titanic acid. It is named in honor of 

 the English chemist Hatchett, who discovered the element 

 columbium. 



Henwoodite. Essentially a hydrous phosphate of alumi- 

 num and copper; described by Collins from the West Phe- 

 nix Mine in Cornwall. It occurs in globular masses of a tur- 

 quois-blue color on limonite. 



Hetcerolite. Closely associated (hence the name from 

 e-aipog, companion) with chalcophanite at the zinc-mines of 

 Sterling Hill, N. J. It occurs in botryoidal coatings, of a 

 black color. In composition it is, according to Dr. Moore, a 

 zinc hausmannite. 



Ileubachite. A h yd rated oxide of cobalt and nickel; de- 

 scribed by Sandberger as occurring in thin coatings on ba- 

 rite at the mines in Heubach, near Wittichen, Baden. 



Hexagonite. Described as a new mineral by Goldsmith, 

 but shown by Koenig to be a manganesian variety of tremo- 

 lite, from St. Lawrence County, N. Y. 



Homilite. Found in orthorhombic crystals, of a brownish- 

 black color, at Stockoe,near Brevig,Xorway. In composition, 

 according to Paijkull, it is allied to datolite, being a silicate 

 of calcium and iron containing 18 per cent, of boracic acid. 



