SCIENCE AND REVOLUTION 



involve the control of all evolutionary processes 

 which endanger the persistence of that form. 

 So long as such a control is not established, 

 there is a " transmigration of the soul," but not 

 in the way that the mystics use this term. The 

 physiological processes of a certain positive con- 

 sciousness, or " soul," are converted by the proc- 

 ess of " death," into negative consciousness, 

 which in turn becomes the positive consciousness 

 of some other form. 



With Haeckel and Jacques Loeb, a school of 

 biologists has arisen, which marks a new stage 

 in the revolution of the ideas concerning life 

 and consciousness. This school has made the 

 first steps toward a conscious control of the 

 processes of life and consciousness, and the ques- 

 tion of the control of these processes is within 

 measurable distance of solution by means of 

 laboratory methods. Loeb's works on tropisms 

 and his " Comparative Physiology of the Brain 

 and Comparative Psychology " are indispensable 

 textbooks for every sincere student of materialist 

 monism. 



Other sciences have likewise gone far on the 

 road toward a conscious control of universal 

 processes. Liebig's commercial chemistry inaug- 

 urated the realization of Berthelot's dream, 



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