II. MINING. 



869 



35. Mica-schist, with garnet and 

 stuurolite. Taganai, Ural. 



36. Mica-schist, with garnet and 

 staurolite. Zlatoust, Ural. 



37. Chlorite-slate. Werchneiviiisk, 

 Ural. 



38. Chlorite slate, with tourmaline. 

 Roshkino, Ural. 



39. Talcoze-slate. Regewsk, Ural. 



40. Listwenite. Ufoleisk, Ural. 



41. Stacoluinite. Voitzk, Archangel. 



42. Quartz-porphyry. Isle Hoghland. 



43. Felsite. Lake Aouschkul, Ural. 



44. Yariolitic-felsite. Altai, Siberia. 



45. Orthoclase-labradorite porphyry. 

 Isle Hoghland. 



46. Hornblendic porphyry. Bogos- 

 lovsk, Ural. 



47. Porphyrite. Goroblagodatsk, 

 Ural. 



48. Plugioclase-porphyry. Altai, Si- 

 beria. 



49. Augite-porphyry. Blagodat, 

 Ural. 



50. Uralite-porphyry. Katharinen- 

 burg, Ural. 



51. Oligoclase-diabasite porphyry. 

 Aiatsk, Ural. 



52. Felsitic-retinite (Kulibinite) . 

 Nertchinsk, Siberia. 



53. Amorphic-trapp (Sordowalite"). 

 Serdobol, Finland. 



54. Trachyte. Kasbek, Caucasus. 



55. Hornblendic-andesite. Koktebel, 

 Crimea. 



56. Augite-andesite. Kasbek, Cau- 

 casus. 



57. Andesitic-lava. Kasbek, Cau- 

 casus. 



58. Obsidian. Goktcha, Caucasus. 



59. Anamesite. Rowno, Volhynia. 



3379b. Specimens of Minerals of the Porphyry Class 

 (23). Prof* v & n Lasaulx, Breslau University. 



3379c. Microscopic Slides (33). 



Prof, von Lasaulxj Breslau University. 



GO. Basalt. Goktcha, Caucasus. 

 C 1 . Rock salt. Iletzk, Orenburg. 



62. Marble. Gornoshitsk, Ural. 



63. Limestone. Sanarka, Ural. 



64. Oolite. Kamenka, Podolia. 



65. Ophiocalcite. Kussinsk, Ural. 



66. 67, 68. Dolomitic-marble. Tiv- 

 dia, Olonetz. 



69. Dolomitic-marble. Kapselga, 

 Olonetz. 



70. Maguesite. Poliakovsk, Ural. 



71. Porous quartz. Beresovsk, Ural. 



72. Lydite with anthracite. Isle 

 Volk, Lake Onega. 



73. Hornstone with silver. Altai, 

 Siberia. 



74. Jasper. Lake Kalgan, Ural. 



75. Jasper. Poliakovsk, Ural. 



76. Magnetite. Blagodatsk, Ural. 



77. Specular-iron-schist. Krivoi-Rog, 

 Cherson. 



78. Spathose-iron. Satkinsk, Ural. 



79. Sphaerosiderite. Kromy, Orel. 



80. Chromite. Ural. 



81. Graphite. Tunkinsk, Siberia. 



82. Graphite. Tunguska, Siberia. 



83. Anthracite. Grushevka, Chain 

 of the Donetz. 



84. Coal. Chain of the Donetz. 



85. Coal. Regewsk, Ural. 



86. Coal. Tovarkova, Tula. 



87. Boghead-coal. Muraievna, Ria- 

 zan. 



88. let. Tkvibul, Caucasus. 



89. 90, 91. Sandstone. Shoksha, 

 Olonetz. 



92. Sandstone. Vytegra, Olonetz. 



93. Apatite-sandstone. Kursk. 



94. Apatite-sandstone. Tainbof. 



95. Almnstone. Zaglic, Caucasus. 



II. MINING. 



3383. Ramsay's Water Gauge, for measuring the friction 

 of ventilating currents in mines or other places. D. P. Mwison. 



The india-rubber tube is connected with the return airway of the mine, 

 the other compartment of the apparatus being in communication with the 



