But also the direct influence which the cultivation of music may exercise upon the body is not insignificant, considered medically. Thus, for instance, singing, if judiciously practised, is conducive to health, inasmuch as it benefits the lungs and the chest; and the playing on certain musical instruments is salutary, while on others it is injurious. Moreover, in combination with dancing, music is likely to prove in some complaints an efficacious remedy. Of course, everything depends upon its judicious employment, if it is to serve medically. In order exactly to ascertain its efficacy it is advisable to examine its employment as we find it in different nations. Even the most uncivilized tribes ought not to be ignored in this enquiry, because the dictates of instinct are often not less suggestive than the speculations of reason. Nations, or tribes, in a low state of civilization, as there are many still existing at the present day, have generally so-called "mystery-men," or "medicine-men," who combine in one person the avocation of the priest, physician, and musician, and who are also usually prophets, sorcerers, rain-makers, shrewd advisers,--in short, men who by their comparatively superior knowledge and skill obtain considerable influence over their ignorant and superstitious fellow-men. The most ancient nations historically known were far more advanced in civilization than these our contemporaries. However, we find with them traces of the original existence of "mystery-men." With the Greeks, music, or the art of the Muses, originally comprised, besides the tone-art, several other arts and sciences; from which it may be conjectured that the earliest Greek musicians practised also the healing art like the mystery-men of our time. The ancient Egyptians, at an early period, had attained a considerably higher stage of development in the cultivation of music than many nations of the present day have achieved. This assertion will not appear exaggerated to any musician who has carefully examined the ancient representations of the variously-constructed instruments which were in use with the Egyptians, centuries before our Christian era. Equally suggestive is a statement of Herodotus, indicating the progress which the Egyptians had made in the healing art, nearly 500 years before our era. He remarks (Euterpe 84): "The art of medicine is thus divided amongst them: each physician applies himself to one disease only, and not more. All places abound in physicians; some physicians are for the eyes, others for the head, others for the teeth, others for the parts about the belly, and others for internal disorders." Such a high degree of cultivation of an art or science, in which each professor occupies himself especially with a particular branch in order to achieve the utmost possible perfection in it, is known at the present day only among the most civilized nations.