[i 9 oi.] 



RICHTER, E. Der Staubfall vom 11. Marz und die Gletscherforschung. Centralbh. 



f. Min. 1901, pp. 662-663. 1901. 

 2. Rapport de la Commission internationale des Glaciers. C. P, Congres 



geol. internet, viii. pp. 205-212. 1901. 

 , &c. Les Variations periodiques des Glaciers. Cinquieme Rapport, 1899.. 



Arch. Sci. phi/s. et nab. Geneve, x. pp. (1-20). 1900. 

 RICHTER, 0. Em Beitrag znr Kenntniss des Magnesium-Ammonium-Plaospliates, 



Mg(NH 4 )PO 4 + 6HoO. [Struvite or Guanite.] Min. petr. Mitth. xx. pp. 89-98,. 



pi. iii. 1901. ^ 



RICHTER, P. Ueber Pflanzen ans dem Neocom des Langenberges bei Quedlinburg- 



Zeitschr. detitsch. geol. Gesellsch. liii. Protok. pp. 20-21. 1901. 

 RICHTHOFEN, Baeon F. von. Geomorphologiscbe Studien aus Ostasien. II. 



Sits. Jc.-preuss. Alcad. Wissensch. 1901, pp. 782-808. 1901. And A.C. 

 2. Ueber Gestalt und Gliederung einer Grundlinie in der Morphologie Ostasiens.. 



[Abstract, by K. Futteeee.] Peterm. Mitth. xlvii. pp. 140-142. 1901. 

 RICKARD, T. A. The Minerals which accompany Gold, and their Bearing upon 



the Richness of Ore-Deposits. Trans. Inst. Mining Sf Metall, vi. pp. 194-211, 



figs. 1899. 



2. The Cripple-Creek Goldfield. Ibid. viii. pp. 48-111, figs. & pi. xi [map J- 



1900. 



3. The Cripple-Creek Volcano. Trans. Am. Inst. M. U. xxx. pp. 367-403, 



figs. 1901. 



■ 4. The Telluride-Ores in Cripple Creek and Kalgoorlie. Ibid. pp. 708-718. 



1901. 



5. The Indicator Vein, Ballarat (Australia). Ibid. pp. 1004-1019, fig. 



1901. 



RIES, H. Limestones of New York and their Economic Value. Ann. Pep. JSf.1T. 



State Mus. li. pt. 2, pp. 355-467. 1899. 

 2. Theodoee Geeenlt White. [Obit.] Am. Geol. xxviii. pp. 269-270, 



1 pi. 1901. 



3. Clay and Clay-Products at the Paris Exposition of 1900. Ann. Pep. U.S.. 



Geol. Surv. xxi. pt. 6 (non-Metallic), pp. 365-392. 1901. 



4. Felspar and Quartz. Ibid. pp. 593-596. 1901. 



. See Claek, W. B., &c. 



RIGAUX, E. Note sur des Bondages effectues a Boulogne-sur-Mer et aux 



Environs. Bull. Soc. Acad. Boulogne-sur-Mer, vi. pp. 1-10. 1901. A.C. 

 RIMATORI, C. Dati analitici su alcuni Campioni di Manganese di Sardegna*. 



Atti P. Accad. Lincei, ser. 5, Pendic. x. sem. 2, pp. 226-232. 1901. 

 RINNE, F. Kupferuranit und seine Entwasserungsprodukte (Metakupferuranite).. 



Centralbl.f. Min. 1901, pp. 618-626, figs. 1901. 

 2. Kalkuranit und seine Entwasserungsprodukte (Metakalkuranite). Ibid.. 



pp. 709-713. 1901. 



3. Notiz fiber Sattel- und Muldengange in Handstiicken von Quarzit aus 



Griqualand (Siid-Afrika). Zeitschr. deutsch. geol. Gesellsch. liii. Br.-Mitth. 



pp. 29-31, figs. 1901. 

 4. Kupferreiche Sande im Malaguitgebiet bei Paracale (Luzon). Zeitschr. f.. 



praJct. Geol, 1901, pp. 387-389. 1901. 

 5. Gesteinskunde fur Techniker, Bergingenieure und Studierende der Natur- 



wissenschaften. Pp. i-vii, 1-206, figs. & 4 pis. 8vo. Hanover, 1901. 

 RIPPAS, P. Compte-rendu des Recherches geologiques le long du Chemin de Fer 



Moscou-Briansk. Bull. Com. geol. Pussie, xix. pp. 319-362. 1900. 

 2. Compte-rendn des Recherches geologiques dans les Etablissement forestiers 



du Gouvernement de Toula. Ibid. pp. 423-462. 1900. 

 RISTORI, G. Le Formazioni ofiolitiche del Poggio dei Leccioni (Serrazzano) ed il 



Filone fra Gabbro-rosso e Serpentina, pi-esso il Torrente Sancherino. Boll. Soc. 



geol. ital. xix. pp. 677-694. 1900. 

 RIVA, C {the late). Sul Metamorfismo subito dai Gneiss al Contatto coi Porfidi 



quarziferi nelle Vicinanze di Porto Ceresio (Lago di Lugano). Pendic. P. 1st. 



lomb. ser. 2, xxxiii. pp. 146-151. 1900. 

 2. Sopra due Sanidinite delle Isole Flegree, con alcune Considerazioni intorno 



all' Impiego di Liquidi a noto Indice de Rifrazione per la Determinazione dei 



Minerali componenti le Rocce. Piv. Min. Crist, ital, Padova, xxvi. pp. 21-34. 



1901. 



3. Ueber die Brechungsexponenten des Anorthoklas von Portoscuso (Sar- 



dinien). Zeitschr. f. Kryst, xxxv. p. 274. 1901. 

 4. Die Feldspathe des Granitit von Cala Francese a of der Insel Maddalena 



(Sardinien) nebst einigen Bemerkungen fiber Brechungsexponenten von. 



Mikroklin. Ibid. pp. 361-369, figs. 1901." 



