87 



[l 9 2I.] 



RICHARDSON, W. A., 5. The Micro-Petrography of the Rock-Gypsum of 



Nottinghamshire. Min. Mag. xix. pp. 196-207, figs. 1921. And A.C. 

 RICHTER, E. See Richtee, R., 2 & 3. 



RICHTER, R. Die Entstehung der abgerollten ' Daleider Versteinerungen ' und 

 das Alter ihrer Mutterschichteii. Jahrb. k.-preuss. geol. Landesanst. xxxvii. 

 pt. 1, pp. 247-259, pis. xxv-xxvii. 1917. 



2, & E. Richtee. Palaontologische Beobachtungen im Rheinischen Devon. 



I — Ueher einzelne Arten von Acidaspis, Lichees, Cheirurus, Aristozoe, Pro- 

 soccelus, Terebratula und Spirophyton aus der Eifel. Jahrb. nassauisch. 

 Ver. Naturk. lxx. pp. 143-161, figs., pi. i. 1918. 



3, & . Ueber zwei Gesteinsbildende Spirifer- Arten des Wetteldorfer 



Sandsteins. Ibid, lxxii. pp. 26-28, figs. 1920. 



RIDDELL, C. W. See Cease, W. 0. 



RIDEWOOD, W. G. Obit.— See Asdeews, C. W., 4. 



RIDSDALE, H. H. The Geological Relationship of the South Staffordshire, 



Warwickshire, South Derbyshire, and Leicestershire Coalfields. Trans. Inst. 



M.E. lx. pp. 189-205, pi. iii Tgeol. map]. 1921 ; & Coll. Guard, exxi. pp. 38- 



39, 110-111, figs. [geol. map]. 1921. 

 RIEDEL, A. Beitrage zur Palaontologie und Stratigraphie der Ceratiten des 



Deutschen Oberen Muschelkalks. Jahrb. k.-preuss. geol. Landesanst. xxxvii. 



pt. 1, pp. 1-116, figs., pis. i-xviii. 1916. 

 . See also Stoeley, E., 3. 



RIES, H., & T. L. Watson. Elements of Engineering Geology. Pp. i-v, 1-365, 



figs. [maps]. 8vo. New York, 1921. 

 RINNE, F. Die Geothermischen Metamorphosen und die Dislokationen der 



Deutschen Kalisalzlagerstatten. Fortschr. Min. Krist. Petr. vi. pp. 101-136, 



figs. 1920. 



RITZEL, A. Ueber die Mischkristalle von Salmiak und Eisenchlorid. ' Chemie 



der Brde,' Jena, i. pp. [1-48], figs. 1914. A.C. 

 ROBERTS, J. D. See Feankeoetee, C. J. 

 ROBERTSON, W. F. See Beitish Columbia. 



ROBINSON, A. H. A. Investigation of Iron-Ore Deposits in Northern Ontario. 



Summ. Rep. Mines Branch Canada, 1919, pp. 13-16. 1920. 

 ROBINSON, G. W. The Physical Properties of the Soil in Relation to Survey 



Work. Chem. News, exxiii. pp. 5-6. 1921. 

 ROBINSON, J. W. D. The Devonian of Ferques (Lower Boulonnais). Quart. 



Joum. Geol. Soc. lxxvi. pp. 228-237, pi. xiv [geol. map]. 1921. 

 ROCCATT, A. II Bacino della Beonia ed il Massiccio del Monte Bego (Alpi 



Marittime). Atti Soc. ital. Sci. nat. lv. pp. 5-68, pis. i & ii. 1916. 

 ROGERS, A. F. Cristobalite in the Spherulitic Obsidian from Yellowstone 



National Park. Am. Min. vi. pp. 4-6. 1921. 



2. Supplementary Note on Cristobalite. Ibid. p. 60. 1921. 



ROGERS, A. W. Geological Survey and its Aims ; and a Discussion on the 



Origin of the Great Escarpment. Proc. Geol. Soc. S. Afr. xxiii. pp. xix- 



xxxiii. fig. 1921. 



2. Discussion on Dr. A. L. Du Ton's paper, ' The Kai'roo Dolerites of South 



Africa.' Ibid,, pp. xxxvii-xxxix. 1921. 

 ROGERS, G. S. Chemical Relations of the Oil-Field Waters in San Joaquin 



Valley, California. Bull. U.S. Geol. Surv. no. 653, pp. 1-119, figs. 1917. 

 2. Helium-Bearing Natural Gas. Prof. Papers U.S. Geol. Surv. no. 121, 



pp. 1-113, figs., pis. i-iv [geol. map]. 1921. 

 ROLLIER, L. Fossiles Nouveaux ou peu connus des Terrains Secondares 



(Mesozoiques) du Jura et des Contrees Environnantes. 8e fascicule. Mem. Soc. 



paleont. Suisse, xliv. pp. 75-101, figs., pis. xlvi-xlix. 1919. 

 ■ 2. Synopsis des Spirobranches (Brachiopodes) Jurassiques Celtosouabes. 



Partie 4. (Zeilleri des— Repertoires). Ibid. pp. 279-422. 1919. _ 

 3. Sur les Facies du Numrnulitique. JEclogce Geol. Uelv. xvi. pp. 134-136. 



1920. 



ROMAN, F. Restes de Mammiferes Terrestres des Argiles Aquitaniennes Marines 

 de Fontcaude pres Montpellier. Bull. Soc. geol. Prance, ser 4, xix. pp. 33-37, 

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2, & P. de Been. Sur la Structure de la Chaine des Alpines. C. B. Acad. 



Sci. Paris, clxxii. pp. 1367-1369, fig. 1921. 

 ROMIEUX, A. L'Evolution du Dynamisme Terrestre. C. B. Acad. Sci. Paris, 



clxxii. pp. 393-396. 1921. 

 2. Le Litage des Displacements de Lignes de Rivage devant le Phenomene 



d'Equideformation. Ibid. pp. 1422-1425, fig. 1921. 



