442 PROCEEDINGS OF THE ACADEMY OF [1897. 



northwest of that village, to the right of the river Isseta, and almost 

 on the summit of the Oural divide. Besides minerals about which 

 the data are not yet complete, such as Disthene, Beryl of lilac color, 

 red Corundum, etc., there are met with here Aqua marine, Vesuvian- 

 ite, Garnet, Essonite and Almandine, Epidote in great abundance, 

 Pouschkinite, Axinite,Yttrotantalite, Titanite, Chinochlore, Amazon 

 stone (Microcline) in great crystals, Amphibole, Rock Crystal Pyrite 

 transformed to Limonite, etc. These occurrences are in a development 

 of gneisso-grauites. The predominant rock is a feldspathic rock, poor 

 in mica and almost destitute of Amphibole. This feldspathic rock is 

 accompanied by a rock very rich in Amphibole, sometimes closely 

 associated with amphibolite (Mt. Medwejka, Romanorka), some- 

 times with amphibolic gneiss (Medwejka, Poup), sometimes with a 

 diorite (Sewernaia, Yelowaia), which occupy lower horizons than the 

 feldspathic rock, although they constitute independent and not very 

 great elevations. 



The above minerals are the product of metamorphism. They are 

 found usually at a slight depth in contact with feldspathic and 

 amphibolic rocks, and are almost always accompanied by Epidote. 

 In the mountain Poup the minerals accompany the crystals of dolo- 

 mite, and are found in places where the dolomite comes in contact 

 with amphibolic gneiss, the surface of the hill being formed of 

 granite. The deposits of the greatest interest are : 



Mount Medwejka — Yellow Essonite, rose colored and brown Pis- 

 tacite. 



Mount Yelowaia (Great mine Yevguenie-Maximilianovskaja) — 

 Axinite, Pouschkinite and Titanite. 



Mount Poup (Mine Iwano-Redivotsevskaja) — Essonite, Epidote, 

 Clinochlore. 



Mount Sewernaia- Yereineievskaia) — Aqua Marine, Vesuvianite, 

 Sphene, Garnet, Epidote, Yttrotantalite, Amazon stone etc. [See 

 L. G., VIII.] 



The imperial lapidary establishment in Ekatherinebourg, and the 

 depot where minerals, cut and uncut, are exposed for sale, both 

 under the authority of the government and under private auspices, 

 is of great interest, but the cutting was not being carried on at the 

 time the excursion reached the city. The cups and vases of rock 

 crystal, malachite, jasper, etc., were of great beauty, and showed the 

 skill which has been attained by the Russian lapidaries. 



