a THEORY OF ORGANIC EVOLUTION. 



to make this presentation in order to give a clearer 

 idea of the mechanico-physiological theory, and at 

 the same time to test its worth. 



I. FORMATION OF UNORGANIZED BODIES (CRYSTALS). 



When separated and promiscuously moving mol- 

 ecules of any substance in solution or in a melted 

 condition pass into the solid form by reason of 

 removal of the causes of separation and motion 

 (warmth or solvent), they arrange themselves into 

 solid masses impermeable to liquids. These minute 

 bodies grow by accretion, and when molecular 

 forces are permitted to act undisturbed, assume the 

 regular outer form and inner structure of crystals. 

 The number of crystals, their size, changes of form 

 and growth, all depend on external conditions. 



2. FORMATION OF LIVING ORGANIZED (MICELLAR) 



BODIES. 



Certain organic compounds, among them albu- 

 men, are neither soluble, despite their great affinity 

 for water, nor are they fusible, and hence are pro- 

 duced in the micellar form. These compounds are 

 formed in water, where the molecules that arise 

 immediately adjoining each other arrange them- 

 selves into incipient crystals, or micellae. Only such 

 of the molecules as are formed subsequently and 

 come in contact with a micella contribute to its 

 increase in size, while the others, on account of 

 their insolubility, produce new micellae. For this 



