410 Additional Nofes^ 



then it will be necessaiy to conceive of some sentient beings, 

 capable of those sensations, distinct from all the vibrations^ 

 which produce them. 



*' Hearing, however, is but one of our senses ; and its sensa-.. 

 lions are the most simple: they differ only in degree. By 

 each of the other four we have a variety of sensations which 

 differ specifically as well as in degree. Who can name the 

 varieties of colour which we perceive by the eye ? Tastes and 

 smells are innumerable. They differ specifically, and each 

 is capable of all degrees of strength and weakness. But how 

 shall we find in vibrations a variety corresponding to the im- 

 mense variety of sensations which we have from sight, hear- 

 ing, taste, smell, and touch? And how shall they account for 

 all the ideas which we have from all the other sources and 

 powers of thought, upon mechanical principles ? Common 

 sense, reason, and philosophy, are in a lamentable condition 

 when such theories gain ground among men. He who would 

 be a materialist in the nineteenth century, would have been a 

 believer in the doctrine of transubstantiation in the twelfth." 



Note CNN J, page 21 1.— -As this theory makes an important 

 part of a medical work which is highly popular, and has an ex- 

 tensive circulation in the United States j and as there is reason 

 to suppose that many superficial thinkers have been seduced 

 into the adoption of its principles by the plausible aspect which 

 it wears, the following remarks are respectfully submitted to 

 the reader, not as containing a full refutation of the Darmnian 

 doctrines, but as suggesting some hints worthy of the considera- 

 tion of those who are disposed to embrace them, 



1, Dr. Darwin sets out with a singular inconsistency. He 

 declares that, by the Spirit of Aiiiviation, or Sensorial Fouer, 

 he means only that animal life which mankind possess in com- 

 mon with brutes, and, in some degree, even with vegetables j 

 and that he leaves the consideration of the immortal part of us, 

 which is the object of religion, to those who treat of revelation. 

 Yet he afterwards proceeds, in the same work, to show how the 

 sensorial power produces ideas of memory, imagination, ab- 

 straction, Sec, which have always been considered as belonging 



