1897.] NATURAL SCIENCES OF PHILADELPHIA. 437 



specifically described by Arzruni in L. G. IV) lie either in raiassite, 

 syenite or gneiss. The veins most extensive and remarkable for 

 the minerals they contain are in a peculiar green granite traversing 

 the gneiss. The granite typical of the veins consists of amazon 

 stone (microcline), albite, gray colorless or almost black quartz and 

 biotite. The miassite is often very coarsely granular, the individual 

 crystals attaining frequently 10 centimeters and more, and a speci- 

 men of biotite weighing 62-67 kilog. having been found. Some fine 

 graphic granite is formed of quartz and amazonite. 



The rock contains cavities filled with argillaceous matter called 

 " salo " (grease) in which are found attached to the walls finely 

 developed crystals of Topaz and among other minerals, Beryl (Aqua 

 marine), Phenacite, Tourmaline, Columbite, Samarskite, Monacite, 

 Monazitoid, Helvine, Garnet, Malaconite, Cryolite, Chiolite, etc. 



The veins of micaceous syenite, consisting of Orthose, Plagioclase, 

 Biotite and sometimes Muscovite, which cut the gueiss, contain very 

 various minerals: Zircon, Pyrochlore, iEschynite, Monacite, and 

 sometimes Apatite, Sphene, Magnetite and Ilmenite. 



On August 1 (13) the portions of the Ilmen mountains near the 

 station were examined by the excursionists. The distance to the 

 first opening was about 4 wersts, exhibiting miassite containing 

 Zircon, Elseolite and Nepheline. 



Besides typical miassite we obtained Elseolite with white masses of 

 Nepheline, Biotite and Ilmenite. The Ilmens themselves are the 

 most gently sloping of hills and of very moderate height. Further 

 on were found openings where Sodalite and Amazon-stone were pro- 

 cured. Among the more important minerals, of which more detailed 

 description will be found in L. C. IV by Arzruni, are iEschynite, 

 Amphibole, Apatite, Beryl,Cancrinite, Chiolite, Columbite, Desmine, 

 Elseolite, Epidote, the Feldspar group, Microcline, Fluorite, Garnet, 

 Graphite, Helvine, Ilmenite, Corundum, Cryolite, Magnetite, Mar- 

 tite, Mobybdenite, Monacite, Orthite, Phenacite, Pyrochlore, Quartz, 

 Rutile, Samarskite, Scapolite, Sodalite, Titanite, Topaz (which was 

 the first mineral found here in the XVIII Century by the Cossack 

 Protow), Tschewkenite, Tourmaline, Uralite and Zircon. 



After an examination of these localities the route was continued 

 toward Tcheliabinsk. At the station Bichkil a party of ten excur. 

 sionists set out in droschkes sixty wersts to visit the gold deposits of 

 Katch-Kar (or Kotch-Kar). This region is situated 80 kilometers 

 southwest of'Miass. The 360 to 400 mining localities that the dis- 



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