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T^y^ BEGINNINGS OF LIFE. 



9^ 



one of the atoms of hydrogen by an atom of methy], so 



N (CH,) H 



the further action of methyl, ending in a further substi- 

 tution, there is reached the still more compound sub- 

 stance dimethyl-amine, N(CH3)(CH3)H. And in this 

 manner highly complex substances are eventually built 



up 



method 



significant. Two complex compounds are employed to 

 generate, by their action upon one another, a compound 

 of still greater complexity; different heterogeneous 

 eir laboiato::; molecules of one stage, become parents of a molecule 



a stage higher in heterogeneity. Thus having built up 

 )ilitiesto* ^^tWz acid out of its elements, and having by the 



process of substitution described above changed the 

 acetic acid into propionic acid, and propionic into 



laborator)' .; 



'ohml 1 butyric, of which the formula is 



this complex compound 



(CH3) (CH,) H 



(HO) 



operating upon another 



ig Its appi"- complex compound, such as the dimethyl-amine named 



plexity 



of dimethyl-amine |^ ^ co'^^^Jo)'^ ^} ^(^3) (CH3)H. 

 See then the remarkable parallelism. The progress 

 towards higher types of organic molecules is effected 



modifications upon 



modifications; as throughout 



Evolution in general. Each of these modifications is 

 a change of the molecule into eauilil 



irium 



environment— an adaptation, as it were, to new sur- 

 rounding conditions to which it is subjected ; as through- 

 out Evolution in general. Larger, or more integrated. 



