552 SCIENTIFIC RECORD FOR 1884. 



W. E. Hidden {Amer. Journ. Sci., xxvii, 73), atStoneham, and in suflfi 

 cient quantities to allow of its thorough study. The crj talline form has 

 been found to be near that of the original mineral {lb., p. 229), and also 

 its optical characters {Bull. Soc. Min., France, vii, 230). An analysis 

 was made by J. B. Mackintosh {Amer. Journ. Sci., xxvii, 135), which 

 resulted in proving that it was a fluo-phosphate of beryllium and cal- 

 cium. Some doubt was thrown upon this determination by analyses by 

 Winkler {Jahrh. Min., 1884, ii, 134), on both the Maine mineral and that 

 from the original Saxon locality. The analyses of Winkler, however, 

 were made upon minute quantities, and have since been proved by Genth 

 to be inaccurate {Amer. Phil. Soc, October 17, 1884), Genth's results con- 

 firming those of Mackintosh most fully and establishing the identity of 

 the two minerals. 



Another mineralogical discovery of hardly less interest is that of the 

 beautiful new borate Called colemanite, a description of which is given 

 among the new species beyond. The new Colorado minerals, zunyite 

 and guitermanite, are also mentioned in the same place. 



Dr. Hillebrand has described a number of mineral occurrences which 

 present points of novelty. One paper {Amer. Journ. Sci., xxvii, 349) con- 

 tains an account of an unusual variety of nickeliferous lollingite occurring 

 in complex twin crystals, from Teocalli Mountain, on Brush Creek, Gunni- 

 son County, Colorado ; of a variety of cosalite containing 8.4 per cent, of 

 silver and 7.5 per cent, of copper, from the Comstock mine near Parrott 

 City, La Plata County j of a sulphide of bismuth, silver and copper, per- 

 haps new, from the Missouri mine, Hall's Valley, Park County: of hiib- 

 nerite, from the Uncompahgre district, Ouray County, and also from 

 Phillipsburg, Montana. 



Another paper by the same author {Proc. Colorado Sci. Soc, i, 112), 

 contains descriptions of a number of rare minerals, the majority new to 

 America, from the American Eagle mine, Tintic district, Utah. These 

 are olivenite in fine crystals, also in the brown compact fibrous form 

 called wood copper; conichalcite in emerald-green globular forms, with 

 radiated structure; chenevixite, in olive-green to greenish-yellow, com- 

 pact masses imbedded in the ore; also jarosite and a hydrous calcium 

 arsenate in fine, silky, white needles. He also describes bindheimite from 

 Secret Caiion, Nevada; zinckenite from the Brobdignag mine, Red 

 Mountain, San Juan County, Colorado ; and the rare nickel telluride 

 melonite from Boulder County, Colorado. Mr. Richard Pearce mentions 

 {lb., p. Ill) the occurrence of native bismuth with bismutite from Cum- 

 mins City, North Park, Colorado. The same volume of Proceedings re- 

 ferred to also contains a list of the important minerals of Colorado, with 

 localities, prepared by Mr. Whitman Cross. 



Prof. W. P. Blake has described the occurrence of gigantic crystals 

 of spodumene at the Etta tin mine in Pennington County, Dakota. One 

 crystal is spoken of penetrating massive quartz and feldspar, which was 

 36 feet long and from 1 to 3 feet in thickness. At the Ingersoll claim, 



