Formed Constituents of Organisms 173 



tions may be on a macroscopic scale, through sudden change 

 of environment, or by hybridization action, when mutational 

 evolutionary changes Hke those elaborately advocated by 

 de Vries may be started; (6) that all changes, even of the most 

 minute kind, are due primarily to changing or changed lines 

 of energy-flow, which start and gradually establish changed 

 positions, relations, and amounts of the energized molecules 

 which such lines of energy determine and build into place. 



