原文 (英语)

CHAPTER I. PHYSICAL CULTURE. Gymnastic and calisthenic exercises are invaluable aids to the culture and development of the bodily organs, for purposes of vocalization. The organs of the voice require vigour and pliancy of muscle, to perform their office with energy and effect. Before proceeding to the vocal gymnastics, it is indispensable, almost, to practice a series of muscular exercises, adapted to the expansion of the chest, freedom of the circulation, and general vitality of