ELENCO DEI CAMBI 
XXI 
Svezia. 
Stockholm. — Geologislca fóreningen i Stockholm. 
Fòrhandlingar [bd. XII, 1890]. 
— K. Svenska Vetenskaps Akademien. 
Arkiv fòr Kemi, Mineralogi och Geologi [bd. 2, 1905]. 
Arkiv fòr Zoologi [bd. 3, 1906]. 
Arkiv fòr Botanik [bd. 5, 1905]. 
Upsala. — Geological Institution of tlie University of Upsala (Bi- 
bliothèque de l’Univeraité R.). 
Bulletin | voi. I, 1892J. 
Svizzera. 
Zuricli. — Naturforschende Gesellschaft. 
Vierteljahrsschrift [anno LV, 1910]. 
Africa. 
Cape Town. — Geological Commission Departement of Agriculture. 
Annual report [1°, 1896]. 
Johannesburg. — Geological Society of South Africa. 
Transactions [voi. VI, 1904]. 
Proceedings [anno 1905]. 
America. 
Baltimore (U. S. A.). — Maryland Geological Survey. 
Reports [voi. I, 1897). 
Berkeley, California (U. S. A.). — Exchange Department University 
of California Library. 
Bulletin of thè department of Geology [voi. 5, 1906]. 
Buenos-Aires (R. Argentina). — Instituto geografico Argentino. 
Boletin [t. X, 1889]. 
— Ministerio de Agricultura. División de Minas, Geologia é 
Hidrologia. 
Anales [t. IV, 1910]. 
