PREFACE AND INTRODUCTION 



THIS small volume makes public a new 

 Theory. At the outset it is most important 

 to make clear that no attempt is made to 

 prove the Theory. For this reason it would 

 have been better perhaps to have called it 

 a New Hypothesis. Nevertheless, although 

 proof is not attempted, the numerous ex- 

 amples mentioned for purposes of illustration 

 are, in themselves, facts which the Theory 

 correlates, and therefore to some extent put 

 the Theory to test. 



One reason why proof is not attempted, 

 is that many and important observations 

 which would best test the Theory, have 

 either not been made or records of them have 

 not been found. So much is this the case, 

 that one of the chief reasons in bringing for- 

 ward the Theory is to stimulate such research. 

 Another reason is that it supports Charles 

 Darwin's Causo-mechanical Theory of the 

 Origin of Species. A weak part in this great 

 Theory is and always has been the subsidiary 



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