Physiological Morphology 109 



formation of the blastula, of course it is not possible to get the 

 later stages which are determined by the blastula. 



I have chosen the name Physiological Morphology for these 

 investigations, inasmuch as their object has been to derive the 

 laws of organization from the common source of all life phenom- 

 ena, i.e., the chemical activity of the cell. In what way this 

 is to be done is indicated in the chapter on the mechanics of 

 growth. 



But the aim of Physiological Morphology is not solely 

 analytical. It has another and higher aim, which is synthetical 

 or constructive, that is, to form new combinations from the 

 elements of living nature, just as the phj'sicist and chemist 

 form new combinations from the elements of non-living nature. 



