77 



[l 9 2I.| 



0C0XX0R. P. C. S. The Rajputana Salt-Industrv. Ghem. News, cxxihY 

 pp. 111-114. 1921. 



ODDOXE, E. L'Azione delle Onde Sismiclie sulle Condotte. (Indagine Sismolo- 



gica con applicazione all' Ingegneria.) Soil. Soc. sism. ital. xx. pp. 57-184, 



fi°:s., pis. i & ii. 1916. 

 2. II Terreinoto dell' Alta Valle del Tevere del 26 Aprile 1917. Ibid. xxL 



pp. 9-27, fig., pis. i-iv. 1918. 

 3. Eelazione della Commissione Governativa incaricata dello Studio dei ; 



Boinbi e Terremoti verificatisi nei rnesi di ottobre e novembve 1917 in Provincia 



di Ancona. Ibid. pp. 37-46, pis. v & vi [geol. sketch-map]. 1918. 

 4. Sull' Ingrandimento e sui Periodi dei Pendoli non smorzati. Ibid. xxii.. 



pp. 143-163, figs. 1919. 

 CEDUM, H. Et Elsdvrfund fra Taaderup paa Falster. Damn. geol. Undersog. 



ser. 4, i. no. 11, pp. 1-16, figs. 1920. 

 (EH MIC HEX, J. Una Escursion al Yacimiento de Sulfato de Cobre de Copa- 



quire en el Xorte de Chile. Sol. Soc. nac. Mineria. Santiago, xxxiii. pp. 502- 



508. 1920. 



(EYEX, P. A. To Torvmyrer. Naturen, xlv. pp. 286-288. 1921. 



OGG. A. Crystalline Structure of Antimony and Bismuth. Trans. Roy. Soc. 



S. Afr. x. pp. 75-79, figs. 1921. 

 OHASHI, E. Augite from Xishigatake, Japan. Jlin. 3Iag. xix. pp. 173-180j 



figs. 1921. 



OLDHAM, E. D. Annual General Meeting. [Obituaries, etc.] Quart. Journ. 

 Geol. Soc. lxxvii. pp. vii-lxxvi. 1921; & Abs. Proc. Geol. Soc. 1920-21, 

 pp. 49-57. 1921. 



2. Anniversary Address of the President: Tvujfit Yeavror. 'Know your- 



Faults.' Quart. Journ. Geol. Soc. lxxvii. pp. lxxvii-xcii. 1921; & Abs. Proc. 

 Geol. Soc. 1920-21, p. 57. 1921. 



3. A Seasonal Variation in the Frequency of Earthquakes. (Second Com- 

 munication.) Quart. Journ. Geol. Soc. lxxvii. pp. 1-3. 1921. 



. See also Cowie, H. McC. 



OLMSTEAD. S. G. Economic Geology of the Ophir Mining District. JEcon. 



Geol. xvi. pp. 433-456, fig. 1921. 

 OLSSON. J. Metodfor Undersokning av Lerors Hallfasthetsegenskaper, tillampad 



vid de Geotekniska Undersokningarna vid Statens Jarnvagar. Geol. Fb'ren. 



Stockh. Fbrh. xliii. pp. 502-507. 1921. 

 OMBOXr, G. Obit— See Maeiaxi, E., 9. 



OXGLEY, M.. & E. O. MacPheesox. Collingwood Subdivision. Ann. Pep. N.Z. 



Geol. Surv. no. 14, pp. 6-7. 1920. 

 . See also HENDERSON, J., 5. 



OPPEXHEIM, P. Ueber das Marine Pliocan der Bohrung von Xiitterden bei 

 Cleve. Jalirb. Ic.-preuss. geol. Landesanst. xxxvi. pt. 2, pp. 421-434, pi. lv. 

 1916. 



2. Palaontologische Miscellaneen. Ill— 1. Ueber Hydractinien aus den 



Mitteleocanen Tuffen von San Giovanni Ilarione in Venetien. 2. Ueber ein 

 Erscheinen Mesozoischer Typen in der Korallenfauna des Mediterranen Altter- 

 tiars. 3. Ueber eine neue Cyatlwseris (C. pachypetala, n. sp.) aus dem Eocan 

 von Barcelona. Zeitschr. dentsch. geol. Gesellsch. lxxii. Abli. pp. 145-160, 

 figs., pi. iv. 1920. 



OPPLIGEE, F. Ueber neue Juraspongien. Eclogce Geol. Helv. xvi. pp. 133-131. 

 1920. 



OELOV, X. A. Obit.— See Spexcee, L. J., 2. 



OSBOEX, H. F. Eesemblances and Contrasts between Zoologic and Paljeontologic 

 Eesearch in Mammalogy. Desirabilit3 r of Uniform Standards and Systems 

 in Classification, in Description, in Measurement, in Eeasoning. Journal of 

 Mammalogy, ii. pp. 1-11, figs. 1921. A.C. 



2. Bibliogiaphv of Hexet Faiefield Osboen for the Year 1920. 1 page. 



8vo. 1921. A.C. 



3. The Evolution, Phylogeny, and Classification of the Proboscidea. Am. ILus. . 



Novitates, no. 1, pp. 1-15, figs. 1921. A.C. 

 4. First Appearance of the True Mastodon in America. Ibid. no. 10, pp. 1-6, 



figs. 1921. A.C. 



5. The Hall of the Age of Man in the American Museum. Nature, cvii. 



pp. 236-240, figs. 1921. 

 6, & C. C. Mook. Camarasaurus, Am phic alias, and other Sauropods of 



Cope. Mem. Am. Mus. Nat. Hist. n.s. iii. pp. 247-387, figs., pis. lx-lxxxv. 



1921. 



