It would require too much space, and would lead me too far from my original subject, to enquire into, and to trace out, the means by which simple sounds, produced by vibration, percussion or detonation, affect the mind and imagination of the hearer. It will be sufficient to say, that the individual experience of every one, will bear witness to the existence of this most powerful agency. The music of a low sweet voice, how it penetrates and vibrates through the whole being! The music of the small birds, though limited in its scale, how it fills up the measure of the imagination, by giving a voice of harmony to the silent beauties of nature. The pealing organ with its various tones, breathes out religious strains, and moves the heart to penitence and prayer. This instrument is suited above all others, to display the imagination of a master hand, from the vast extent of its compass, and the almost endless variety of its powers by combinations. It affects the imagination more than any individual instrument, or any combination of instruments. How deep and varied the emotions of the heart of him, whose “spirit is attentive,” while listening to one of the sublime masses of Mozart, Haydn or Beethoven. With what a thrilling and awful feeling, the dark, mysterious and wailing miserere falls upon the soul; and with what a happy contrast, does the beautiful and comforting benedictus, pour “oil upon the bruised spirit.” The shrill fife, the hollow drum and the clangourous trumpet, speak to other and wilder passions of our hearts. They breathe an inspiration into the mind; they nerve the arm, make firm the tread, and give an animated existence to slumbering ambition, or wavering courage. The soft toned flute, the plaintive oboe, the mellow clarionette, with the other various harmonious instruments, under the influence of the creative mind, affect to smiles or tears, discourse of love, or breathe of hate, according to the shades of feeling pourtrayed by the composition. But by what means is the imitation of these non-tangible things, transferred to a medium, which is not visible to the eye, nor distinguishable to the touch? From whence does the musician draw, to enable him to affect his hearers, by the means of sound, with the very feelings which he attempts to imitate? We will proceed to answer these inquiries.