TENSION" PHENOMENA OF LIVING ELEMENTS. 



139 



per sec., but where it has to pass cell walls .001-. 03 mm. per sec. 

 However, the stoppage of the streaming was his criterion of the 

 presence of the stimulus, and probably the banking of the stream 



+ -f + + 



h 

 f- 



h 



1- 



f 

 h 



i~ 

 + 



T 

 -h 



-f- 



-1 



FIG. 2. 



I In- -|ii.iu-~ represent the plasma membranes <>: Fur further 



explanation see Fig. i. 



at din point, soon stopped the whole stn-am thn^ sinnil.uini!, 

 tin- pn 'i Motion of the stimulus. 



\\ . \AK' ' i>IS. 



If si ijnul.it ion consists in increase in prrmraln'lity, we should 

 r\P-t i in.i -tin tics to prevent this change. The object of this 

 c'liauu-r i- 10 prrsent evidence that may support or refute such a 

 hypothesis. 



<>\ertoii i -1 .served that warm- and cold-blooded vertebra; 

 insects and entomostraca, require practically the same con- 

 centration of the ana-.-t Ill-tic for narcosis. Certain groups of 



