70 



Jahrg. Bd. Seite 



Igelström, L. J.: Feldspath barytiques des mines de man- 

 ganese de Sjögrufvan, paroisse de Grythyttan, gouverne- 

 ment d'Oerebro, Suede. R 89 II 409 



— Langbanite de Sjögrufvan (Suede). R 89 II 410 



Ine ring, Herrn, von: Die Lagoa dos Patos. R 88 I 252 



Ilosvay, Ludwig: Ueber die Bedingungen der Bildung von 



gediegenem Schwefel. R 87 I 249 



Inkey, B. v.: Nagyäg Földtani es Bänväszati Viszonvai. R. 86 I 421 



— Geotektonische Skizze der westlichen Hälfte des rumäni- 



schen Grenzgebirges. R 87 II 466 



Inostranzeff, A. v.: Ueber eine Vergleichungskammer zur 

 mikroskopischen Untersuchung undurchsichtiger Mine- 

 ralien. (Mit 2 Holzschnitten.) B 85 II 94 



— Ueber „Schungit", ein äusserstes Glied in der Reihe der 



amorphen Kohlenstoffe. B 86 I 92 



— Sur la variabilite de la concentration et de la composition 



des sources minerales. R 87 I 427 



— Dactylodus rossicus n. sp. R 89 1 152 



— Geologie. I. Band: Die geologischen Erscheinungen der 



Gegenwart, Petrographie und Stratigraphie. R. . . 86 I 227 



— Geologie. H. Band: Historische Geologie. R. ... 88 II 274 

 Irving, A. : The Permian-Trias Question. R. 86 I 436 



— The Permian-Trias Question. R 86 I 436 



— Notes on the so called Bunter Schiefer. R 86 I 436 



— On the Dyas (Permian) and Trias of Central Europe 



and the true divisional line of these two Systems. " R. 86 I 436 



— The inconformity between the Bagshot beds and the 



London clay. R. 87 I 314 



■ — An Outlier of Upper Bagshot Sands on London clay. R, 87 II 352 



— The Physical History of the Bagshot beds of the London 



Basin. R 88 I 454 



— The Tertiary outliers on the North Downs. R. ... 89 I 131 



— Sections of Bagshot beds at Finchamptead, Berks. R. 89 I 468 



— On the Stratigraphy of the Bagshot beds of the London 



basin. R 89 I 469 



Irving, R. D.: Divisibility of the Archaean in the Northwest. R. 85 II 296 



— The Copper-bearing Rocks of Lake Superior. R. . . 85 II 297 



— Preliminary Paper on an Investigation of the Archaean 



Formations of the Northwestern States. R. ... 87 I 71 



— Origin of the Ferruginous Schists and Iron-ores of the 



Lake Superior Region. R 87 II 474 



— Is there a Huroman Group? R 88 I 435 



— and J. C. Chamberlain: Observations on the Junction 



between the Eastern Sandstone and the Keweenaw 



Series on Keweenaw Point, Lake Superior. R. . . 87 I 73 



— and C. R. Van Hise: On Secondary Enlargements of 



Mineral Fragments in certain Rocks. R 87 I 68 



Issel, A.: Note al rilevamento geologico del territorio com- 

 preso nei fogli di Cairo Montenotte e Varazze della 

 carta topographica militare. R 87 II 136 



— Catalogo di fossili della Pietro di Finale. R 87 II 152 



— Sur l'epoque du creusement des vallees submergees du 



golfe de Genes. R 88 II 64 



— A. L. Mazzuoli e D. Zaccagna: Carta geologica delle 



riviere liguri e delle Alpi marittime. R 89 I 101 



