1 54 SENESCENCE AND REJUVENESCENCE 



Johnson, H. P. 



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1888. "Recherches experimentales sur la multiplication des Infusories 

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1889. "La rajeunissement karyogamique chez les cilies," Arch, de zool. 

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Weismann, a. 



1882. Uber die Dauer des Lebens. Jena. 

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1908. "The Life-Cycle of Paramecium When Subjected to a Varied 

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1909. "Further Studies on the Life-Cycle of Paramecium," Biol. Bull., 

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1911a. "Two Thousand Generations oi Paramecium," Arch.f. Protisten- 



kunde, XXI. 

 191 1&. "Paramecium aurelia and Paramecium caudatum," Jour, of 



Morphol., XXII. 

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ohne Konjugation oder kiinstliche Reizung," Biol. CenlralU., 



XXXIII. 

 19136. "Cell Size, Nuclear Size and the Nucleo-cytoplasmic Relation 



during the Life of a Pedigreed Race of Oxytricha fallax," Jour. 



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 Woodruff, L. L., and Erdmann, Rhoda. 



1914. "A Normal Periodic Reorganization Process without Cell Fusion 



in Paramecium," Jour, of Exp. Zool., XVII. 

 ZwEiBAUM, J. (Enriques et Zweibaum) . 



1912. "La conjugaison et la differenciation sexuelle chez les Infusories: 



V, Les conditions necessaires et suffisantes pour la conjugaison du 



Paramoecium caudatum," Arch. f. Protistenkunde, XXVI. 



