66 ANDREWS. 



bands of this, the crab, or even the tadpole or frog, and within 

 the limits of the general stability of the whole area, or sub- 

 divisions of it, there may be seen to go on local transmutations 

 of finer structure and even local modifications of the structure 

 of Butschli, as well as transpositions of the continuous sub- 

 stance. Scheme within scheme of simultaneous differentia- 

 tions and physiological activities within a given area is thus 

 opened up to us. 



[72] In all it is the continuous substance and its organized 

 relations to the alveolar inclusions which rank first ; inclusion 

 organization ranks second, yet may to large extent control the 

 phenomena. The true interaction and relations of these two 

 groups of elements are made clearer in later sections. ^ 



[73] To sum up finally: in all the organisms examined, areal 

 differentiations of the substance, in the threefold character of 

 optical, physical, and physiological difference, express organi- 

 zation of the substance as such on a physical basis of the foam 

 structure ; and each area so formed, however fleetingly, must 

 be understood as a true substance organ, within, or without, its 

 possible larger relation of organ of the organism. 



I have tried to iterate the above facts in such a way as to 

 express somewhat schematically the aspect in which they 

 present themselves to various points of view from which I 

 approached the substance as such; and they play into each 

 other in such a way as to make this seem a most fruitful plan 

 of investigation for the student of living phenomena. 



The few facts given here, like all those from which they were 

 selected, are so inseparably correlated with the whole scheme 

 of substance phenomena that they cannot be even fairly grasped 

 until others, equally representative of other generalized substance 

 phenomena, are at once within reach of the mind. Yet it is 

 necessary in speaking of them to use to some extent the terms 

 which all formulate, bespeaking the forbearance of the reader 

 until the end of the argument be reached. 



^ See Contractility, and Selection of Environment by the Substance. 



