The noticeable thing however is that if _a_ stands merely for the sensation, _x_ really is a little more than _a_: the connotation (in the author's sense of the term) of the concrete name is not _wholly_ dropped in the abstract name. The term blackness, and every other abstract term, includes in its signification the existence of a black object, though without declaring what it is. That is indeed the distinction between the name of an attribute, and the name of a kind or type of sensation. Names of sensations by themselves are not abstract but concrete names. They mark the type of the sensation, but they do not mark it as emanating from any object. "The sensation of black" is a concrete name, which expresses the sensation apart from all reference to an object. "Blackness" expresses the same sensation with reference to an object, by which the sensation is supposed to be excited. Abstract names thus still retain a limited amount of connotation in both the author's senses of the term--the vaguer and the more specific sense. It is only in the sense to which I am anxious to restrict the term, that any abstract name is without connotation. An abstract name, then, may be defined as the name of an attribute; and, in the ultimate analysis, as the name of one or more of the sensations of a cluster; not by themselves, but considered as part of any or all of the various clusters, into which that type of sensations enters as a component part.--_Ed._] {305} It hence, also, appears that there can be no ABSTRACT term without an implied CONCRETE, though cases are not wanting, in which there is much occasion for the ABSTRACT term but not much for the CONCRETE; in which, therefore, the concrete is not in use, or is supplied by another form of expression. {306} In regular and capricious languages, as our own, the dropping of the connotation of the concrete terms is not marked in a uniform manner; and this requires some illustration. Thus, heavy is a concrete term, and we shew the dropping of the connotation, by the same mark as in the instances above, saying heaviness; but we have another term which is exactly the equivalent of heaviness, and frequently used as the abstract of heavy; that is, weight. Friend is a concrete, connotative term, in the substantive form. Its connotation is dropped by another mark, the syllable ship; thus, friendship; in like manner, generalship; brothership; cousinship. The syllable age is another of the marks we use for the same purpose; pilotage, parsonage, stowage.