"I. Of Singing. On the means of facilitating the practice of singing. Dietary and general rules for male singers, and for female singers. Of the different human voices. II. Of the Clavier-Instruments, or Keyed-Instruments. The Pianoforte. The Organ. The Harmonica with a key-board. III. Of the Stringed Instruments. The Violin and the Viola (or Tenor). The Violoncello. The Double Bass. The Guitar. The Harp. IV. Of the Wind Instruments. Means for facilitating the practice and dietary rules for players on wind instruments. The Flageolet and the Czakan. The Flute. The Oboe and the English Horn. The Clarionet and the Basset Horn. The Bassoon and the Contra-Fagotto. The Horn. The Trumpet. The Trombone. The Serpent. General dietary and medical rules for those who cultivate music. Of the disturbances and injuries to the nervous system through disadvantageous influences by the practice of music. Care and treatment of particular diseased parts and structures. Of the chest and the lungs. The especial attention and care required by the organs of the voice. Of the diseases to which the mouth is subjected. The Teeth. The Lips. Of the Fingers. The Eyes and the Face. Prescriptions for some of the medicaments alluded to in the preceding dissertation." The author is of opinion that the practice of music may be in many ways injurious to bodily health. However, he remarks, that since music is capable of expressing emotions which cannot be expressed by words or pictures, it relieves the heart of anything which is oppressive and distressing, and thus through the mind generally acts beneficially upon the body. He asserts that music has healed many a sufferer whose life was embittered by the fetters of melancholia, or the tortures of hypochondria. To persons suffering from indigestion and its harassing effects, he recommends a daily practice on some instrument which requires a rather fatiguing exertion of the body; such as the organ, on which hands and feet are occupied. His remarks on singing are judicious; but many of them would naturally suggest themselves to any thinking musician. No doubt, moderation in eating and drinking is recommendable, and the singer has to take care not to catch a cold; but it may be useful to him to be told by a medical man what kind of food is most conducive to the preservation of his voice, and how he can best protect himself against the injurious effects of sudden changes from heat and cold, to which professional singers are often exposed.