78 



PEROUX, E. Le Puits artesien de Maisons-Laffitte (Paris). Bull. Soc. geol. 



France, ser. 4, x. pp. 18-26. 1910. 

 PERRIER, — . See Douville, H. ; also Zeillee, R, 



PERVINQUIERE, L. Sur la Geologie de l'Extreme Sud de la Tunisie et de la 

 Tripolitaine, specialernent des Environs de Ghadames. C. R. Acad. Sci. Paris, 

 cliii. pp. 1183-1186. 1911. 



PETRASCHECK, W. Das Alter der Floze in der Peterswalder Mulde und die 

 Natur der Orlauer und der Michalkowitzer Storung hn Mahrisch-Ostrauer Stein- 

 kohlenrevier. Jahrb. k.-Tc. geol. Reichsanst. Ix. pp. 779-814, figs., pis. xxx & 

 xxxi. 1911. 



PETTERD, W. F. Obit.— See Anon., 12. 



PEYROT, A. See Cossmann, M. 



PPEIFFER, G. See Edeleaku, L. 



PHALEN, W. C, & L. Maetin. Mineral Resources of Johnstown (Pa.) and 

 Vicinity. Bull. U.S. Geol. Surv. no. 417, pp. 1-142, figs., pis. i-iv [geol. mapj. 

 1911. 



PHILIPP, H. Ueber Glazialerscheinungen in der Rhon. Zeitschr. f. Gletscherlc., 



Berlin, iii. pp. 286-296, figs. 1909. 

 PHILIPPI, E. Ueber die Landeis-Beobachtungen der letzten funf Siidpolar- 



Expeditionen. ZeitscJir.f. Gletscherlc., Berlin, ii. pp. 1-21. 1908. 

 ■ . Obit— See Anon., 13. 



PHILIPPSON, A. Reisen und Forscbungen im westliehen Kleinasien. II. Heft. 

 Peterm. Mitth., Brgdnzungsh. no. 172, pp. 1-100, pis. i-ix & geol. map. 

 1911. 



PICARD, E. See Siegert, L. ; also Weest, E., 2. 



PICKERING, G. F. Notes on the Lithology of the Millstone Grit (Rough Rock) 



of Horsforth, near Leeds. Trans. Leeds Geol. Assoc. xvi. pp. 27-30. 1911. 

 PICKINGS. H. B. See Donkin, H., pc. 



P1ERRET, Ruth, & F. Soddy. The Ratio between Uranium and Radium in 

 Minerals. Bond. JEdinb. Dull. Phil. Mag. ser. 6, xxi. pp. 652-658. 1911. 



PIETZCKER, F. Ueber die Convoluten aus dem Omatenton Scliwabens. [Am- 

 monites convohitus.~] Jahresh. Ver. Naturk. Wurit. lxvii. pp. 118-217, figs. 

 1911. 



PIETZSCH, K. Cruzianen aus dem Untersilur des Leipziger Kreises. Zeitschr. 



deutsch. geol. Gesellsch. lxii. Aufsdtze, pp. 571-582, fig., pis. xi-xiii. 1911. 

 PILSBRY, H. A. Scaphopoda of the Jamaican Oligocene and Costa Rican Pliocene. 



Proc. Acad. Nat. Sci. Philad. lxiii. pp. 165-169, figs. 1911. 

 ■ 2. A new PJcpJ/ora of the Chesapeake Miocene. Proc. Acad. Nat. Sci. 



Philad. lxiii. pp. 438-439, fig. 1911. 

 . See also Brown, A. P., 2. 



PIOLTI, G. Sintesi della Smithsonite e dell' Anglesite. Atti E. Acc. Sci. Torino, 



xlvi. pp. 783-788, fig. 1911. 

 PIRSSON, L. V. Contributions to the Geolog3 r of New Hampshire. V. Petrology 



of Tripyramid Mountain. Am. Journ.Sci. ser. 4, xxxi. pp. 405-431, fig. 1911. 

 • 2, & W. N. Rich. Contributions to the Geology of New Hampshire. IV. 



Geology of Tripyramid Mountain. Am. Journ. Sci. ser. 4, xxxi. pp. 269-291, 



figs. [geol. map.] . 1911. 

 PISSARRO, G. See Cossmann, M., 2. 

 PITTMAN, E. F. See New South Wales, Dep. of Mines. 



PIUTTI, A., & E. Comanducci. Analisi chimica dell' Acqua minerale da Tavola 

 ' Rio d'Oliveto ' nei Tenimenti d'Oliveto-Citra (Salerno). Atti P. Acc. Sci. 

 Napoli, ser. 2, xiv. pp. 1-22. 1910. 



PLATO'S Atlantis. See Habenicht, H., 2. 



POCHELS, F. JEnderungen der Rotations-Geschwindigkeit der Erde als geolo- 



gischer Faktor. Geol. Rundsch., Leipzig, ii. pp. 141-144. 1911. 

 PODEK, F. Das Homorod-Almascher Ilohlengebiet. Verh. siebenbiirg. Ver. 



Naturtv. Ix. 1910, pp. 104-111, 1 pi. [topogr. map]. 1911. 

 POGUE, J. E. A possible Limiting Effect of Ground- Water upon .Eolian Erosion. 



Journ. Geol., Chicago, xix. pp. 270-271. 1911. 

 2. On Sand-Barytes from Kharga (Egypt). Proc. TT.S. Nat. 3Ius. xxxviii. 



pp. 17-24, fig., pi. ix.; & Zeitschr./. Kryst. xlix. pp. 226-228. 1911. 

 ■ 3. On Calamine Crystals from Mexico, Rutile-Mica Intergrowth from Canada, 



and Pseudomorphs of Marcasite after Pyrrhotite from Prussia. Proc. U.S. Nat. 



Mus. Wash, xxxix. pp. 571-579, fig., "pis. lxi & lxii. 1911. And A.C.; also 



Zeitschr. f. Krist. xlix. pp. 455-58, pi. vii ( pars). 1911. 

 4. Gold- und Bleiglanzkrvstalle in Verwachsung mit einem Vvurfel von Pvrit. 



Zeitschr. f. Krgst. xlix. pp. 225-226. 1911. 



