In the author's footnote he recognises that the abstract power of smelling enters into this particular application of the word Smell; and refers to a subsequent part of the treatise for the meaning of Power. But he thinks that along with the power, or as part of the conception of Power, the material organ is also signified. It seems to me that the organ does not enter in either of these modes, into the signification of the word. We can imagine ourselves ignorant that we possess physical organs; or aware that we possess them, but not aware that our sensations of smell are connected with them. Yet on either of these suppositions the "power of smelling" would be perfectly intelligible, and would have the same meaning to us which it has now.--_Ed._] {15} In the phrases in which smell is called a SENSE, as when we say, that smell is one of the five senses, there is considerable complexity. The term here imports the _organ_, it imports the _sensation_, and, in a certain way, it imports also the _object_. It imports the organ as existing continuously, the sensation as existing only under a certain condition, and that condition the presence of the object.[2*] [Mill's footnote 2: It will naturally occur to some of my readers, that, in the term sense of smelling, the idea of power is also included. They will say, that when we speak of the sense of smelling, we mean not only the organ, but the function of the organ, or its power of producing a certain effect. This is undoubtedly true; but when the real meaning of the language is evolved, it only amounts to that which is delivered in the text. For what does any person mean when he says that, in the sense of smelling, he has the power of smelling? Only this, that he has an organ, and that when the object of that organ is presented to it, sensation is the consequence. In all this, there is nothing but the organ, the object, and the sensation, conceived in a certain order. This will more fully appear when the meaning of the relative terms, cause and effect, has been explained.--(_Author's Note_.)] {16} SECTION II. HEARING. In Hearing, the same three particulars, the ORGAN, the OBJECT, and the FEELING, require to be distinguished. The name of the organ is the Ear; and its nice and complicated structure has been described with minuteness and admiration by anatomists and physiologists.