1897.] NATURAL SCIENCES OF PHILADELPHIA. 443 



The minerals offered for sale comprise all those which are known 

 in the entire Oural region as well as those from this particular district, 

 and have no further claim to enumeration here, since they will be 

 mentioned in connection with the visit to the localities where they 

 occur. This and the other great lapidary institution of Russia at 

 Peterhof employ some of the most skilful artisans in the world. 



Leaving Ekatherinebourg on August 6 (18), the railroad passes 

 successively over the narrow belt of diabases, etc, bordering the city 

 on the west, and runs northwest nearly parallel to the upper shore of 

 the lake Werkh-Issetsk through narrow tongues of diallage and 

 limestones, and of crystalline schists called M, into the broad belt of 

 granites and syenites containing lakes Isset, Tawatoui, and others. 

 Skirting the southwest and west shores of these at some distance at 

 about the middle of the last named the road swerves to a direction 

 east of north, and follows a thin band of the crystalline schists, M, 

 to its extremity, then passing along the contact of limestones and 

 diabases, and subsequently through first one and then the other 

 of these rocks across a very complicated area. A long course is 

 made through gabbros, etc.; to the station Anatolskaja, near which 

 is the boundary of the mining district of Nijni-Taguil. Between 

 Anatolskaja and the mining center Nijni-Taguil the road lies in 

 granites and syenites, and finally in diabases, porphyrites and tuffs 

 to Taguil and Nijni-Taguil, which are situated at the contact of 

 these rocks with the lower Devonic limestones and marbles. 



Nijni-Taguil the most considerable mining locality of the Ourals, 

 is the property of the heirs of P. Demidow, Prince of San Donato. 

 The founder of the works was Nikita Demidow, who enjoyed great 

 favor with Peter the Great, and established a number of iron works 

 in the Ourals. The river Taguil is dammed at this mining center, and 

 makes a long, narrow lake 12 wersts long, at the northern extremities 

 of which are the hills (or mountains) named Lyssaia-gora (Bald 

 mountain) and Wyssokaia (High mountain). This latter, situated 

 at the west of the village, contains the rich deposits of magnetite 

 which furnish the works of Nijni-Taguil, Niewiansky, Alapaievsky, 

 Werkh-Issetsky, Soukhsounaky and Revdinsky. At Wyssokaia 

 the predominating rocks are porphyries without quartz, and very 

 varied in respect of their constituent elements. The passage from 

 typical porphyritic texture with well developed crystals of Orthoclase 

 and sometimes of Plagioclase and Augite into augitic syenites or 



