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Much additional limnological work has appeared in the Transactions of the 

 American Microscopical Society; Transactions of the Wisconsin Academy 

 Sciences; American Naturalist; Botanical Gazette; Bulletin Ilhnois State 

 Laboratory of Natural History; Annales de Biologie Lacustre; annales de 

 la Station Limnologique de Besse; Archiv. ftir Hydrobiologie u. Plankton- 

 kunde, (formerly Forschungs-berichte aus der biologischen Station zu Plon) ; 

 Biologisches Centralblatt ; Nature; Transactions of the Linnasan Society of 

 London; Zeitschrift fur wissenschaftliche Zoologie; Zoologischer Anzeiger; 

 Zoologisches Jahrbucher, and other current biological journals. 



The seven general limnological works that we regard as most useful are: — ■ 

 Ward and Whipple, in press; Brauer, 1909; Stokes, 1896; Whipple, 1914; 

 Eyferth, 1909; Lampert, 1910, and Steuer, 1910. 



