360 THE POPULAR SCIENCE MONTHLY. 



As the waves follow each other in the order of time, c will travel from 

 one to the other thus : 



First moment Ec' E" E'" E"" 



Second " E'Ec"E"'E"" 



Third " E' E" Ec'" E"" 



Fourth " E'E"E'"Ec"" 



As c travels from E to E it can be no part of E, and must have a dis- 

 tinct existence of its own. The deportment of matter, energy, and 

 consciousness, toward each other, is much like that of the three letters 

 M, E, C, toward each other in our illustration. Let any person try to 

 make these three letters one, as the ancients did by the entities for 

 which they stand, or but two as the moderns do by them, and precisely 

 the same muddle of inconceivability will arise with the letters as has 

 arisen with the things. The materialist is not satisfied with trying to 

 make himself and others believe that matter and energy produce con- 

 sciousness, but he must believe that, no matter how often he changes 

 his matter and energy, every new supply will produce the identical con- 

 sciousness the old one did. If we wish a note of a certain pitch and 

 timbre, we must have matter in a certain form ; and, if we wish a sensa- 

 tion of a certain kind and quality, we must have energy of a certain 

 mode. The tuning-fork or violin-string is not the energy of the vibra- 

 tions, nor is the wave of motion the consciousness of sensation. It is 

 necessary that the brain of to-day be like that of to-morrow if I get the 

 same/brm of consciousness from it each time, but the brain is not the 

 consciousness. To the form of brain there is not continuation of iden- 

 tity. The brain of to-day mimics that of days ago, because the elements 

 of form are put together in the same order. The consciousness that 

 appears is the identical consciousness, no matter what the form nor how 

 much energy has escaped. If we declare matter and energy to be eter- 

 nal, then we must declare the same of consciousness. We know matter 

 as atomic, energy as rhythmic, and consciousness as individualized. 



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SKETCH OF PROFESSOR DU BOIS-REYMOND. 



THE name of Du Bois-Reymond stands high among that group of 

 illustrious scientific men of whom Germany may well be proud. 

 He is known throughout the scientific world for his masterly researches 

 in experimental physiology, having, while yet a young man, made a 

 series of brilliant discoveries in electro-physiology, which at once placed 

 him at the head of that delicate and important branch of investigation. 

 But the customary channels of international scientific communica- 



