While a strict application of the principles of vocal science would demand that the complete course in tone production be covered before even the simplest songs are attempted, this system is almost never carried out logically. The first few lessons are usually devoted to breathing and attack; from then on about half of each lesson time is spent on voice placing and half on songs. In the instruction given on the songs attention is paid to the more strictly musical elements of singing--style, delivery, interpretation, etc., as well as to the formation of the tones. Technical exercises of progressive difficulty are taken up about as soon as the student has acquired sufficient vocal control to perform them. As a rule there is no precise stage at which voice placing work strictly speaking ceases and the technical training of the voice is begun. It cannot be said that any one teacher or vocal expert has founded an authoritative school of vocal science. There is not even anything in the nature of a distinctively national school. Closely resembling methods are followed in all European countries, as well as in America. Every famous modern master has imparted his principles to many students who in their turn have become teachers. Yet it is rather rare for any one to take up the profession of voice culture without first receiving some instruction from several recognized masters. This custom has resulted in a general levelling of systems, each teacher selecting what he considers best from all the methods which he investigates. Meanwhile the old Italian method is still recognized as possessing elements of great value, even in the department of tone production, in which its principles are so imperfectly understood by the scientifically disposed teacher. The great majority of teachers seek to apply some of the principles of the old method, notably its oral traditions, which were discussed a few pages back, in conjunction with the practices of vocal science. Modern voice culture cannot be believed to have reached its final development. Even the most conscientious advocates of the scientific doctrines feel that there is a certain lack of completeness in present methods. Investigations are still being carried on in the various topics of vocal science. It is possible that the near future will see important discoveries in the means for control of laryngeal action and resonance. Some authorities, on the other hand, look altogether in the opposite direction. An abandonment of the doctrines of vocal science and a return to the instinctive methods of the old masters is favored by these teachers.