In addition to these channels of vital transmission, they imagine that the state of our internal organs can be ascertained by the appearance of various parts of the head, which they consider as indicative sympathies of the action of the internal viscera. For instance, the head corresponds with the tongue, the lungs with the nostrils, the spleen with the mouth, the kidneys influence the ear, the liver acts upon the eyes, and thus they consider that they can form a correct idea of the nature of internal maladies by the complexion, the state of the eyes, the sound of the voice, the taste, and the smell of the patient.
The Chinese physiologists also consider the human body as a harmonic instrument, of which the muscles, tendons, nerves, arteries, &c. are vibrating chords, producing various sounds and modulations, and the pulse their chief guide in ascertaining the nature of disease, is but the result of a modification of these sounds as the chords are more or less extended or relaxed.
In addition to these singular views of the human economy, they imagine that the body is influenced by five elementary agents, earth, minerals, water, air, and fire.
Fire prevails in the heart and the thoracic viscera, which bear an astronomic relation with the south.
The liver and the gall-bladder are under the influence of air, which is in relation with the east, whence the winds arise, and it is towards spring that these organs are generally affected.
The kidneys and ureters are ruled by water, astronomically associated with the north—hence winter is the usual season of the maladies in these parts.
The stomach and spleen are regulated by earth, and are placed in connexion with the centre of the firmament, between the five cardinal points, and affections of these parts are observed in the third month of each quarter.
Diseases are distinguished by their vicinity to or their distance from the central part of the body, the heart and lungs, and are usually occasioned by vicissitudes in the atmospheric constitution—varying with cold, heat, and moisture.
The minuteness of their division of maladies is as great as the mechanical precision which all their labours exhibit: for instance, they admit no less than forty-two varieties of the smallpox; according to the shape, colour, situation of the pustules, which they compare to the cocoons of the silkworm—to strings of beads—chaplets of pearls—and lay equal stress on their being flat or round—black, red, or violet. This disease has, indeed, been described by them with much accuracy and judgment, as regards its benign or its confluent character; and there is no doubt that inoculation was practised among them from time immemorial, as I have already shown in the article on that head. Equally accurate have they been in detailing the various symptoms of gout, scurvy, elephantiasis, and syphilis, which also scourges the “Celestial empire.”
The chief guide, however, in their diagnosis and prognosis, is the state of the pulse, and a very curious work, called “The Secrets of the Pulse,” and said to have been written two centuries before our era, by Ouang-chou-hó or Vam-xo-ho. The pulse is divided into the external, the middle, and the deep—producing nine different pulsations called Heon, and the arterial beats were formerly sought for in the joint of the big toe; this custom is now abandoned, but they still follow the strange practice of taking up the right wrist in women and the left in men.