[i8 9 90 



NICOLAU, T. Beitrage zur Kenntniss rumaniseher Felsarten. 1. Diabasporphyrit 



und Variolit von Ortakioi. 2. Elaolitbsyenit-Geschiebe in Rumanien. 3. 



Chloritsericit-Schiefev und Phyllit von Delul Cetatzei Neamtz. Min. petr. 



Mitth. n. s. xviii. pp. 477-503, figs. 1899. 

 NIKITIN, S. Explorations geologiques le long des Lignes du Chemin de Fer Moscou- 



Windau. Bull. Com. geol. Russie, xvii. pp. 297-336. 1898. 

 2. Sur les Minerais de Per du District de Livny, Gouvernement d'Orel, et des 



Regions avoisinantes. Ibid. pp. 439-450. 1898. 

 • 3. Commission de Bibliographic C. R. Congres geol. internat. 1897, vii. 



pp. cxcv-cxcvi. 1899. 

 NITZE, H. B. C. The Stassfurt Region Salt-Deposits in Germany, with special 



reference to the Potassium and Magnesium Salts. Mines Sf Minerals, Scranton, 



xix. pp. 521-522. 1899. 

 , & C. W. Purington. The Kotchkar Gold-Mines, Ural Mountains, Russia. 



Trans. Am. Inst. M.E. xxviii. pp. 24-32. 1899. 

 NOE von ARCHENEGG, A. Beitrage zur Tertiarflora Steiermarks. Mitth. naU 



Ver. SteiermarJc, 1898, xxxv. pp. 56-63, 1 pi. 1899. 

 NOETLING, F. Beitrage zur Morphologie des Pelecypodeuschlosses. iV. J. f* 



Min. xiii. Beilage-Band, pp. 141-184, figs., pi. xi. 1899. 

 NORDENSKJOLD, E. Om Skifferbitar, som traffats Flytande pa Hafsytan i 



Sydvestra Patagonien. Geol. Foren. Stochh. Forh. xxi. pp. 536-538, fig. 



1899. 



NORDENSKJOLD, O. Reisen im Feuerland. Verh. deutsch. wissenscJi. Ver. 



Santiago, iii. pp. 432-434. 1897. 

 2. Ueber das geologische Auftreten einiger chilenischen Erzlagerstatten in 



den Provinzen Coquimbo und Atacama. Ibid. pp. 437-438. 1897. 

 3. Preliminary Notes on the Surface- Geology of the Yukon Territory. Am. 



Geol. xxiii. pp. 288-298. 1899. 

 4. Ueber einige Erzlagerstatten der Atacamawiiste. II. Silberminen von 



Arqueros, &c. Bull. Geol. Inst. Univ. Upsala, iv. pp. 28-44, figs. 1899. 



And A.C. 



5. Die geologischen Verhaltnisse der Goldlagerstatten des Klondike-Gebietes. 



Zeitschr. f.prakt. Geol. 1899, pp. 71-83, fig. [Map, 1 inch = about 10 miles.] 

 1899. 



NORDENSTROM, G. The most Prominent and Characteristic Features of Swedish 

 Iron-Ore Mining. Journ. Iron <Sf Steel Inst. liv. 1898, pp. 35-74, figs., 1 pL 

 [Maps : Mines of Sweden, & Central Sweden.] 1899. 



NORRLIN, J. P. See Sederholm, J. J., &c. 



NORTON, W. H. Geology of Scott County. Ann. Rep. Iowa Geol. Surv. 1898, 



ix. pp. 389-519, figs., pis. viii-xi & 1 map, 1899. 

 OAKLEY, C. See Obit., Whitaker, W. 

 OBRUTSCHEV, W. See Suess, E. ' 



OCHSENIUS, C. Ueber eine Bohrung bei Bleckede a. d. Elbe. Zeitschr. deutsch, 



geol. Gesellsch. li. p. 183. 1899. 

 2. Beitrage zur Kenntniss der Art und Weise des Grundwasseraufsteigens hrt 



Schwemmgebirge. Zeitschr. f. praJct. Geol. 1899, pp. 420-422, figs. 1899. 

 . See Luhmann, H. 



OGILVIE, M. M. [Mrs. Gordon]. The Torsion-Structure of the Dolomites. 



Q. J. G. S. lv. pp. 560-633, figs. [Maps: Groden Pass, jJL^; Buchenstein 



Valley, Sella-Enneberg District, ^- 0 ; Peri-Adriatic Area of Subsidence, 



2i3i4oo] 5 pi- xl - [Sella Massive and Enneberg, -L/]. 1899 ; Abs. Proc. Geol. 



Soc. 1898-99, pp. 26-28. 1898. 



2. Torsion-Structure in the Alps. Nature, lx. pp. 443-446, figs. 1899. _ 



OHM, H. Ueber das Weissbleierz von der Grube Perm bei Ibbenbiiren und einige 



andere Weissbleierzvorkommen Westfalens. N. J. f. Min. xiii. Beilage-Band,. 



pp. 1-38, pis. i & ii. 1899. 

 OHMICHEN, H. Goldhaltige Kobaltgange im Transvaal. Zeitschr. f. praH. 



Geol. 1899, pp. 271-274, fig. 1899. 

 OLDHAM, R. D. A Note on the Allah-bund in the North-west of the Rann 



of Kuchh. Mem. Geol. Surv. India, xxviii. pp. 27-30, pi. i. [Map, 1 inch — 



4 miles.] 1898. 



2. The Great Indian Earthquake of June 12, 1897. Rep. Brit. Assoc. 1898, 



pp. 939-940. 1899. 



OLDS, F. The Witwatersrand Goldfields. Trans. Inst. ME. xviii. pp. 89-110. 

 1899. 



OLIPHANT, F. H. Petroleum. [U.S.A., &c] Ann. Rep. U.S. Geol. Surv. xviii. 

 1896-97, pt. v. pp. 747-894. 1897. 



