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St. Petersburg, Societe Ouralienne, Bulletin Tome XIII, Nr. 2. 



Riga, Naturforscher Verein, Korrespondenzblatt Bd. XXXVII. 



Riga, Technischer Verein, Industriezeitung Jahrg. XX, Nr. 21—24, 

 Jahrg. XXI, Nr. 1, 2. 



Nord-, Süd- und Central- Amerilia. 

 Baltimore, Johns Hopkins üniversity, Journal Chemical, Vol. 15 



Nr. 8, Vol. 16 Nr. 1-6. 

 Boston, Society of Natural Ilistorj-, Papers Occasional IV = 



Vol. I, Part. 2; Proceedings Vol. XXVI; Memoirs Vol. III, 



Nr. 14. 

 Boston, American Academy of Arls and Sciences, Proceedings 



N. S. Vol. XXI. 

 Bucnos-Aires, Acadcmia Nacional de Ciencias en Cordoba, Bolc- 



tin Tome XIV, Nr. 1. 

 Butfalo, Society of Natural Sciences, Bulletin Vol. V, Nr. 4. 

 Cambridge, Museum of Comparative Zoology, Bulletin Vol. XXV, 



Nr. 11; Report. 1892,94. 

 Chapel Hill, Elisha Mitchell Scientific Society, Journal 1894, 



Nr. 1. 

 Ciiicinnati, Society of Natural Historv, Journal Vol. XVH, 



Nr. 1-3. 

 Des Moines, Jowa Academy of Sciences, Proceedings for 1893. 

 Des Moines, Jowa Smithsonian Institution, Jowa Geological Sur- 



vey, Vol. II. 

 Halifax, Nova Scotian Institute of Science, Proceedings Vol. I, 



Part. 3. 

 Lawrence, Kansas Universitj-, Vol. III, Nr. 3. 

 Madison, Washburn Observatory, Publications, Vol. VII, Part. 2. 

 Mexico, Observatorio Meteorolog. Central de Mexico, Boletin III, 



Nr. 12, IV Nr. 1, 2. 

 Mexico, Sociedad Cientitica „Antonio Alzatc", Memoii-ias \'ol. 



VII, Nr. 11, 12, Vol. VIII, Nr. 1-4. 

 Minneapolis, Natural Ilistory Society, Aunual Report 1892. 

 Minneapolis, Natural History of Minnesota, Report XXV. 

 Minneapolis, Geological and Natural History, Survey of Minne- 

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