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Philadelphia. Academie of natural science. Proceedings 

 58, 2, 3, 1906; 59, 1, 1907. 



— Journal (2) XIII, 3, 1907. 



Prag. K. böhmische Gesellschaft der Wissenschaften. Sitzungs- 

 berichte 1906; Jahresbericht 1906. 

 Rennes. Societe scientifique et medicale de FOuest. Bulletin 



XV, 1, 2, 3. 1906. 



Rochester. Geological Society of America. Bulletin XVII, 

 1906. 



Rom. Academia Reale dei Lincei. Rendiconti XVI (l. u. 2. 

 sem.), 1907. 



— Comitato R. geologico d'Italia. Bollettiuo 37, 3, 4, 1906; 

 38, 1, 1907. 



— Societä geologica Italiana. Bollettino XXV, 3, 1906; 

 XXVI, 1, 1907. 



St. Etienne. Societe de l'industrie minerale. Bulletin (4), 

 V, 4; (4) VI, 1 — 3; VII, 4, 5. Comptes rendus 

 mensuels, 1907. 



St. Louis. Academy of science. Transactions XV, 6, 1905; 



XVI, 1 — 7, 1906. 



St. Petersburg. Academie Imperiale des sciences. Bulletin 



(5) XXII, XXIII, XXIV, 1905; (6) 1 — 16, 1907. 

 — Societe Imper. des naturalistes (Kaiserl. naturforschende 

 Gesellschaft). Comptes rendus 34, 5, 36, 37, 1906. 



— Russ. Kaiserl. mineralogische Gesellschaft. Verhandlungen 

 (2) 44, 1, 2, 1906. 



— Comite geologique. Memoires N. Ser. XVI, 16 — 29, 

 31, 33, 1906 und 1907. Bulletin XXIV, 1 — 10; XXV, 

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— — Explorations geol. dans les regions auriferes de la 

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South Bethlehem, Pa. Economic Geology with which is incor- 



porated the American Geologist. A Semi - Quarterly 



Journal II, 3, 4, 5, 6, 1907. 

 Springneid, III. Bureau of Labor Statistics of the State 



Illinois. XXV, annual coal report 1906. Biennial-Report. 



XIII, 1904. 



Stockholm. Konigl. Svenska vetenskaps akademiens handliugar 

 41, 4, 42, 1 — 9, 1907. 



— Geolog, föreningen. Eörhandlingar XXVIII, 7, XXIX, 

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— Arkiv för Zoologi III, 3 — 4; Arkiv för Botanik 6, 

 3 — 4; Arkiv för Kemi, Mineralogi och Geologi IL 4 — 6; 

 Arkiv för Matematik. Astronomi och Fysik III, 2 — 4. 



