PART I 



THE INDIVIDUAL ORGANISM WITH REGARD TO 

 FORM AND METABOLISM 



A. ELEMENTARY MORPHOGENESIS 



EVOLUTIO AND EPIGENESIS IN THE OLD SENSE 



THE organism is a specific body, built up by a typical com- 

 bination of specific and different parts. It is implied in 

 the words of this definition, that the organism is different, 

 not only from crystals, as was mentioned in the last lecture, 

 but also from all combinations of crystals, such as those 

 called dendrites and others, which consist of a typical arrange- 

 ment of identical units, the nature of their combination 

 depending on the forces of every single one of their parts. 







For this reason dendrites, in spite of the typical features 

 in their combination, must be called aggregates ; but the 

 organism is not an aggregate even from the most superficial 

 point of view. 



We have said before, what must have been familiar to 

 you already, that the organism is not always the same in 

 its individual life, that it has its development, leading from 

 simpler to more complicated forms of combination of parts ; 

 there is a " production of visible manifoldness " carried out 

 during development, to describe the chief character of that 



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