296 SENSATION AND THE SENSIFEROUS ORGANS 



lence, says of smell : " It appears to be a simple 

 and original affection or feeling of the mind, 

 altogether inexplicable and unaccountable. It is 

 indeed impossible that it can be in any body : it 

 is a sensation, and a sensation can only be in a 

 sentient thing." l 



That which is true of muskiness is true of 

 every other odour. Lavender-smell, clove-smell, 

 garlic-smell, are, like "muskiness," names of 

 states of consciousness, and have no existence 

 except as such. But, in ordinary language, we 

 speak of all these odours as if they were indepen- 

 dent entities residing in lavender, cloves, and 

 garlic ; and it is not without a certain struggle 

 that the false metaphysic of so-called common 

 sense, thus ingrained in us, is expelled. 



For the present purpose, it is unnecessary to in- 

 quire into the origin of our belief in external 

 bodies, or into that of the notion of causation. 

 Assuming the existence of an external world, 

 there is no difficulty in obtaining experimental 

 proof that, as a general rule, olfactory sensations, 



1 An Inquiry into the Human Mind on the Principles of 

 Common Sense, chap. ii. 2. Reid affirms that "it is genius, 

 and not the want of it, that adulterates philosophy, and fills it 

 with error and false theory ;" and no doubt his own lucul (ra- 

 tions are free from the smallest taint of the impurity to which 

 he objects. But, for want of something more than that sort of 

 "common sense," which is very common and a little dull, the 

 contemner of genius did not notice that the admission here 

 made knocks so big a hole in the bottom of ' ' common sense 

 philosophy," that nothing can save it from foundering in the 

 dreaded abyss of Idealism. 



