[1915-19-] 



216 



OSTEN-SACKEN, O. B. von der. Beitrage zu der Kenntnis einiger vor- 

 wiegend aus zoogenen Komponenten aufgebauten Kalksteine. [Ab- 

 stract.] Eclogae Geol. Helv. xiv. pp. 383-387. 1916. 



OSWALD, F. The Nimrud Crater in Turkish Armenia. [Abstract.] Abs. 

 Proc. G. S. 1917-18, pp. 2-4. 1917; & Q. J. G. S. Ixxiv. Proc. pp. i-iii. 

 1918. 



OVERBECK, R. M. A Metallographic Study of the Copper Ores of Maryland. 



Econ. Geol. xi. pp. 151-178, pis. viii-x. 1916. 

 OWENS, J. S. See Strahan, Sir A., 12. 

 OWER, L. See Hunter, S., 2. 



OXAAL, J. Den hvite granit i Sogn, geologisk optrseden og tekniske 

 egenskaper. [English summary.] Norges Geol. Undersok. no. 68 (Aarb. 



1913) , no. i. pp. 1-20, figs. [geol. map] & pis. i-iv. 1914. 



— — 2. Kalkstenshuler i Ranen. [English summary.] Ibid. no. 69 (Aarb. 



1914) , no. ii. pp. 1-47, figs. & 1 pi. [plans & geol. sections]. 1914. 



3. Oversigt over den Norske Steinindustri. Norges Geol. Undersok. 



no. 70, pp. 57-70, figs, [map & diagram]. 1914. 

 4. Hammernesgrotten. Naturen, Bergen, xxxix. pp. 23-28, figs, [map 



& plan]. 1915. 



5. En eiendommelig granitindustri. Ibid. pp. 152-154, fig. 1915. 



■ 6. Norsk granit. [English summary.] Norges Geol. Undersok. no. 



76, pp. 1-220, figs. [geol. maps] & pis. i-viii. 1916. 

 OYU, M. On a New Graphic Method of representing the Chemical Data of 



Igneous Rocks. Sci. Pep. Tohoku Imp. Univ., Sendai, ser. 2, Geol. iv. 



pp. 51-54, pi. xiii [diagrams]. 1915. 



P , S. M. Granite Quarrving in North Wales. Quarry, xxi. pp. 225- 



230, 249-251, 273-275; Ibid. xxii. pp. 5-6, 29-31, 53-55, 77-78, 101-103, 

 131-132, figs. 1915-1916. 



PACHECO, E. H. Coni'erencia sobre o conjunto de trabalhos realizados 

 pelo pessoal dos Laboratories de investigacoes geologicas e preistoricas 

 do " Museo Nacional de Ciencias Naturlaes." Ano e meio de investi- 

 gacoes. Ann. sci. Acad, polyt. Porto, xii. pp. 165-172. 1918. 



PACK, R. W. Reconnaissance of the Barstow-Keamer Region, California. 

 Bull. U.S. Geol. Surv. no. 541, pp. 141-154, pi. vii [geol. map]. 

 1914. 



2. Oil Fields of the Pacific Coast. Bull. Geol. Soc. Am. xxviii. pp. 677- 



684. 1917. 



3. The Estimation of Petroleum Reserves. Trans. Am. Inst. M. E. 



lvii. pp. 968-981, figs, [diagrams]. 1918. 

 . See also Anderson, R. 



— —4, & W. A. English. Geology and Oil Prospects in Waltham, Priest, 

 Bitterwater, and Peachtree Valleys, California; with Notes on Coal. 

 Bull. U.S. Geol. Surv. no. 581, pp. 119-160, figs. & pi. v. [geol. map & 

 sections]. 1914. 



PACKARD, E. L. Fauna! Studies in the Cretaceous of the Santa Ana 

 Mountains of Southern California. Bull. Geol. Univ. Calif, ix. pp. 137- 

 159, 1 map. 1916. 



2. Mesozoic und Cenozoic Mactrinae of the Pacific Coast of North 



America. Ibid. pp. 261-360, figs, [diagrams] & pis. xii-xxxv. 1916. 

 . See also Smith, W. D., 8. 



PADDISON, A. A Note on Desert Sandstone " Blows." Journ. Roy. Soc. 



N.S.W. xlviii. p. 448. 1915. 

 PADGETT, H. D. See Follansbee, R., 4; <fc Lamb, W. A., 1. 

 PADOA, M. II problema dell' affinita chimica nei cristalli e la velocita 



di cristallizzazione. Atti P. Acc. Lincei, ser. 5 Pendic. xxvii. sem 2, 



pp. 59-64. 1918. 



PiELSl, S. Jaakausimerkkeja Etela-Tamirin laaksossa Mongoliassa. 

 [German summary.] Meddel. geogr. Foren. Finland, x. no. 6, pp. 1-11, 

 figs. [map]. 1914. 



PAGNIEZ, — , & L. Bregi. Sondage pour recherche d'eau a Guisnes (Pas- 

 de-Calais). Ann. Soc. giol. Nord. xlii. p. 112. 1913. 



2. Sondage pour recherche d'eau a Wasquehal (Nord). Ibid. p. 112. 



1913. 



3. Sondage pour recherche d'eau a Haubourdin (Nord). Ibid. p. 257. 



1913. 



4. Sondage pour recherche d'eau a Steenvoorde (Nordl. Ibid. p. 301. 



1913. 



