Spirazines 



27 



I 



Q 



5 



r/5. id. 



ceivable, the chemical structure of living matter 

 from which such life processes seem to originate 

 must possess the two following characteristics : 



(1) It must be of such a nature that the process 

 of growth by the formation of peptide linkings 

 with amino acid molecules can take place con- 



