418 PROF. TH. W. ENGELMANN. 



the physicist. From a physiological point of view the further 

 question would arise, how the changes in the water-contents 

 of inotagmata which are accompanied by the physiological phe- 

 nomenon of contraction are occasioned. This is probably the 

 point at which the chemist must take up the question. It is, 

 however, in the present state of our knowledge, idle to express 

 any further opinions upon the subject. 



