LIFE, ITS PHYSICAL BASIS AND SIMPLEST EXPRESSION' 29 



ilar significance are applied to the viscous livaline -mun.I 

 substance, while the denser parts are variously called "inicro- 

 somes, granules, fibrils, sponfj;ioplasni, etc. 



The important part of all this is the fact that all the biclo^rims 

 are not agreed on any certain kind of iniiinate structure of 



Fig. 15. — Different types of cells composing the body of the .«quirrel or other hichly 

 developed animal: A, liver cell; /, food nialerials; «, nucleus; li. complete chII; 

 C, nerve cell, with small part of its fiber; D, nmsrle fiber; K, cells luiiiie ihf J..h!v 

 cavity; F, lining of the windpipe; G, section through the skin. (Highly niut: 



protoplasm as revealed by the highest powers of the inicroscoj)o, 

 but they all agree that there is a fine and real structural orj^aii- 

 ization of what at first glance a])pears to be honiogcuoous 

 structureless life stuff. That is, as Delage expresses it, it is seen 

 that protoplasm is not simply an organic chemical compound. 

 but that it is an organized substance; that is, it po.--;- 

 structure of a higher order than tlie automatic struct iwe of tlio-'" 

 chemical molecules which compose non-living so-called organir 

 substances. But at the same time we arc deceived if we exiH'ct 



