But the artist, and above all the musical artist, must be a citizen of the world. He deals with those forms of emotion common to all mankind, and not with the peculiar little combinations of ideas that grow up in a province, city, or village; though of course he will not neglect local coloring, so well illustrated in the folk-songs or popular melodies that have survived for ages in different countries. Though a vowel can be produced pure only when the resonance-chambers assume a certain form, this is, of course, only one link in the chain of production. The breathing apparatus and the larynx are also concerned, and we are again brought back, as ever, to the triple combination of the three sets of mechanisms so often alluded to, yet, we venture to think, very inadequately linked in the minds of learners, if not also of teachers. In producing a vowel sound the end aimed at is, on the one hand, purity, on the other, as a result, the easy and effective use of mechanisms--_i.e._, the technique. In every case the breath must be used without waste--just enough, and no more; the laryngeal apparatus, the vocal bands, must be so adapted as to set the air of the resonance-chambers into perfect vibration, which only occurs when the expiratory blast is applied in the correct way and at the right moment to the properly adjusted vocal bands. This latter we have defined as the attack. It implies giving a good start to the tone. It is not all, but it is a large half, in the artist and for the auditor. RECONSIDERATION OF THE RESONANCE-CHAMBERS We shall now give further attention to some of the more important parts of the resonance-chambers, in so far as they bear directly on voice-production.