286 SHIRO TASHIRO. 



istic of life, for there are many dead matters which give off CO? 

 continuously, but it is the increase of CO 2 production when 

 crushed which is certainly a phenomenon associated with excit- 

 able tissue only. Hence, when a tissue gives off more CC>2 when 

 mechanically crushed, or injured, it is a sure sign that this tissue 

 is living. 



f 



