CUMULATIVE OK KEFLECTIYE PROOFS. 81 



other roughened wheel in rapid rotation. It is in ac- 

 cordance with this quality in the r, that it is fixed scien- 

 tifically as the Analogue of Rapidity, or of the plus- 

 quantum of motion or velocity. On the contrary, let the 

 same elocutionist render the real value of the sound /, 

 and it will be found to be the opposite of the r in qual- 

 ity or character, and to be the striking imitation of all 

 gentle movements, or of the minus-quantum of motion 

 or velocity. By similar methods and close observa- 

 tions of the mechanical production of the sounds by 

 the organs of speech, and of their suggestive effects 

 upon the ear, it has been found practicable to deter- 

 mine empirically and with proximate accuracy, in 

 confirmation of the pure theory, the Primitive or Or- 

 ganic Meaning of each Articulate Sound. It is the 

 difficulty of this kind of proof, however, that it re- 

 quires viva voce illustration, to be rendered obvious 

 and demonstrative, and that it cannot, therefore, be 

 made wholly available by mere description. In im- 

 mediate connection with this subject stand the splen- 

 did experiments and discoveries of Helmholtz on 

 Sound and Yoice, which, exhaustively pursued, will 

 conduct to a complete mechanical exposition of the 

 reasons of the echoing character between oral and 

 musical sounds, and, finally, of these last, and so of 

 both, with corresponding mental and objective states. 

 118. The proof is Cumulative or Reflective, when it 

 arises from the weU-worJdng of the theory in practice ; 

 by the constant accumulative mass, therefore, of con- 

 firmations reflected or cast back upon the theory by 

 the practical application of it in the infinitely ex- 



