696 SCIENTIFIC KECORD FOR 1885. 



the new occurrences are described chemically by Genth and crystallo- 

 graphically by voui Rath. The descloizite occurs in minute brilliant 

 orange-red crystals; also in reddish chestnut-brown crystals up to 2°^°^ 

 in size and associated with psilomelane and pyrolusite ; and finally in 

 blackish-brown to black crystals, which are sometimes G™"^ in size. The 

 specimens analyzed conformed to the accepted formula of the species. 

 The crystals are varied in habit, chiefly pyramidal ; they are in somt cases 

 quite highly modified and orthorhomhic in crystallization. The results 

 of vom Rath thus differ from those of Websky, who made the species 

 monoclinic. The question is one of interest, since the form of several of 

 the minerals belonging in this libetheuite-olivenite group is somewhat 

 doubtful. It will probably be found that they are all orthorhombic. 

 Descriptions are also given with analyses of the vanadinite and endli- 

 chite (see in the list of new minerals), and finally of the iodyrite. 



The mineral arsenopyrite or mispickel is now being mined in large 

 quantity at Deloro, Hastings County, Ontario. During the past year 

 crystallized specimens have been obtained from there showing the cru- 

 ciform twins observed from other localities (e. g., the Binnenthal in Switz- 

 erland). The " fossil forest " of Arizona has also been developed re- 

 cently as a source of agatized wood ; beautiful polished specimens for 

 table tops and other ornaments are now obtained from that source. A 

 paper on the locality is given by G. F. Kunz, in a recent number of the 

 Popular Science Monthly. Of more scientific interest is the discovery 

 of zinc spinel, gahnite, at the pyrite mine in Rowe, Mass. Fine green 

 octahedral crystals have been described and analyzed by A. G. Dana; 

 associated with it, besides the pyrite, are epidote and rutile. G. F. Kunz 

 has described in some detail the occurrence of native antimony in York 

 County, New Brunswick, and of various copper minerals in Arizona. 

 W. P. Blake mentions the fact that ery thrite is found at Lovelock's Sta- 

 tion, Union Pacific Railroad, in Nevada ; also at the Kelsey mine, Comp- 

 tou, in Los Angeles County, California. W. E. Hidden describes phena- 

 cite from Florissant, El Paso County, Colorado ; xenotime from the 

 same locality ; also a mineral assumed to be fayalite from Cheyenne 

 Mountain, in the same State. The occurrence of minute crystals of fay- 

 alite in the obsidian of the Yellowstone Park is described by W. P. Id- 

 dings, as already noted. The same author, with Whitman Cross, shows 

 that the otherwise rare mineral, allanite, is widely distributed as an ac- 

 cessory microscopic constituent of many rocks. The work of Penfield 

 on crystals of tiemannite from Utah and metacinnabarite from Cali- 

 fornia has already been spoken of, as also that of O. W. Huntington 

 on crystals of azurite from Arizona. The bulletin of Cross and Hille- 

 brand, already alluded to, contains many points in regard to the min- 

 erals of Colorado. 



Of new foreign occurrences the following may be briefly alluded to: 

 Fairfieldite, at Rabenstein, Bavaria, identical with the imperfectly de- 

 scribed leucomanganite; nephrite, near the orient al stone in character, at 



