EXPERIMENTS WITH RADIUM in 



therefore arranged in an entirely different way from 

 isomorphous groups ; so that the ultimate crystal- 

 line nature of the constituent bodies has little if 

 anything to do with the plastide nature of the 

 amorphous substance which they constitute. 



Sach's view was that protoplasm is an organised 

 substance consisting of crystalline, doubly refracting 

 molecules (Micellae). This view is 'now generally 

 accepted. In the moist state each of them (Micellae) 

 is surrounded with an envelope of water in con- 

 sequence of its powerful attraction for them. In 

 their dry state they are supposed to be in mutual 

 contact. This theory of the internal structure of 

 the organised bodies was propounded by Naegeli. 



Now the idea that minute crystalline bodies do take 

 part in vital actions is not to be dismissed without the 

 fullest consideration, and the fact that radiobes are 

 ultimately resolved into minute crystalline forms 

 does not justify the inference that the aggregate 

 body is itself also crystalline. It is, as a whole, 

 a colloid, not a crystal, and the behaviour of such 

 bodies shows that there is a difference, and that 

 upon that difference so much depends — 



" That little more and how much it is, 

 That little less and what worlds away ! " 



as someone who understood the question so appro- 

 priately remarked. 



" That little more " is what in each step upwards 

 in the scale of being, as if by added parts, finally 



