solutions on the growth of some moulds. 



Concerning higher plants, Wieler observed in one case 1} the recovery 

 of Vicia Faba and Phaseolus multiflorm from the plasmolysis caused by 

 sugar solutions, while in the other case 23 he noticed the deformation 

 of the roots of the latter plant when put into glycerin solutions. 

 Stange 3 ' showed in his " Beziehungen zwischen Substratconcentration, 

 Turgor und Wachsthum hei einigen phanerogamen Pflanzen" the 

 adaptation of Phaseolus vulgaris, Pisura sativum and Lnpinus albxis to 

 plasmolyzing agents. Tkue 4j experimented upon the influence of a sudden 

 change of turgor on the growth of Vicia Faba. 



In the animal world, Schmankewitsch 5) came to the conclusion that 

 Branchtpus stagnalis which lives In fresh-water changes into Artemia 

 Milhauseni in brackish water, and then again into Artemia salina in 

 salt-water. That the larvae of sea-urchins are also deformed by various 

 solutions of chemical substances has been shown by the experiments of 

 Herbst. 6) 



There is no doubt that infusoria are like other organisms, also 

 influenced by change in the concentration of the substratum, and within 

 a certain limit, a more or less accommodation to the new medium takes 

 place. But then, to what extent would they accommodate themselves 

 to that medium ? And again, what change is brought about to the bodies 

 of these organisms? Cohn 7) observed in his early investigations that 

 a sudden change of the concentration of the medium was injurious or 



