roS Permanence and Evolution. 



develop their symmetrical and typical structure 

 under the influence of strictly internal laws, 

 grounded in the nature and chemical com- 

 position of each particular crystal, and with 

 which, as they are not propagated by gen- 

 eration,, natural selection, and the survival of 

 the fittest, cannot conceivably have anything 

 to do. 



It would seem then, that, according to Darwin, 

 whereas the different species of crystals develop 

 themselves in symmetrical forms, each of most 

 stiff and unyielding type, organisms which are 

 now very generally supposed to be, as it were, 

 crystals raised to a higher power, are evolved 

 from formless protoplasm ; or from a single cell 

 with no fixed or internal principle of develop- 

 ment by the mere influence of, ist, a tendency 

 to vary in all directions, 2ndly, the opposite 

 tendency to remain in the groove once impressed, 

 3rdly, the influence of natural selection. It 

 appears, therefore, to me that the analogy of 



