speech, has been used currently to denote the sciences themselves, and not merely the disciplines instrumental to them. The _trivium_ and the _quadrivium_ (grammar, logic and rhetoric--geometry, astronomy, music and arithmetic) have been habitually called arts, when some of them have been named in that sense in which they mean not arts but sciences, "only contemplating things in the mind." Hence the nomenclature, history and practical organization, especially in Britain, of one great division of university studies: the division of "arts," with its "faculty," its examinations, and its degrees. In the German language the words for Art and Science have in general been loosely interchanged. The etymology of the word for Art secured a long continuance for this ambiguity. _Kunst_ was employed indiscriminately in both the senses of the primitive _Ich kann_, to signify what I know, or Science, and what I can do, or Art. It was not till the end of the 17th century that a separate word for Science, the modern _Wissenschaft_, came into use. On the other hand, the Greek word [Greek: technae], with its distinct suggestion of the root signification to make or get, acted probably as a safeguard against this tendency. The distinction between [Greek: technae], Art or practice, and [Greek: epistaemae], knowledge or Science, is observed, though not systematically, in Greek philosophy. But for our present purpose, that of making clear the true relation between the one conception and the other, further quotation is rendered superfluous by the discussion the subject has received at the hands of the modern writer already quoted. Between Art, of which we practise the rules, and Science, of which we entertain the doctrines, J.S. Mill establishes the difference in the simplest shape, by pointing out that one grammatical mood is proper for the conclusions of Science, and another for those of Art. Science enunciates her conclusions in the indicative mood, whereas "the imperative is the characteristic of Art, as distinguished from Science." And as Art utters her conclusions in her own form, so she supplies the substance of her own major premise.