of the ailment, that concerned with remedies by prescribing for the immediate removal of the pain. The species of medicine, then, are pharmacy, surgery, diet and regimen, diagnosis, prescription of remedies. There are two divisions of law, the one written and the other unwritten. Written law is that under which we live in different cities, but that which has arisen out of custom is called unwritten law; for instance, not to appear in the market-place undressed or in women’s attire. There is no statute forbidding this, but nevertheless we abstain from such conduct because it is prohibited by an unwritten law. Thus law is either written or unwritten. There are five kinds of speech, of which one is that which politicians employ in the assemblies ; this is called political speech. The second division is that which the rhetors employ in written compositions, whether composed for display or praise or blame, or for accusation. Hence this division is termed rhetorical. The third division of speech is that of private persons conversing with one another ; this is called the mode of speech of ordinary life. Another division of speech is the language of those who converse by means of short questions and answers; this kind is called dialectical. The fifth division is the speech of craftsmen conversing about their own subjects ; this is called technical language. Thus speech is either political, or rhetorical, or that of ordinary conversation, or dialectical, or technical. Music has three divisions. One employs the mouth alone, like singing. The second employs both the