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veins?’ (A.) ‘The aorta from which they ramify, and they are many, none knoweth the tale of them save He who created them; but, as I have before observed, it is said that they are three hundred and threescore in number. Moreover, God hath appointed the tongue to interpret [for the thought], the eyes to serve as lanterns, the nostrils to smell with, and the hands for prehensors. The liver is the seat of pity, the spleen of laughter and the kidneys of craft; the lungs are the ventilators, the stomach the storehouse and the heart the pillar [or mainstay] of the body. When the heart is sound, the whole body is sound, and when the heart is corrupt, the whole body is corrupt.’ (Q.) ‘What are the outward signs and symptoms of disease in the members of the body, both internal and external?’ (A.) ‘A physician, who is a man of understanding, looks into the state of the body and is guided by the feel of the hands, according as they are firm [or flabby], hot or cool, moist or dry. Internal disorders are also indicated by external symptoms, such as yellowness of the [whites of the] eyes, which denotes jaundice, and bending of the back, which denotes disease of the lungs.’ Night ccccli.(Q.) ‘What are the internal symptoms of disease?’ (A.) ‘The science of the diagnosis of disease by internal symptoms is founded upon six canons, to wit, (1) the actions [of the patient] (2) what is evacuated from his body (3) the nature and (4) site of the pain he feels (5) swelling and (6) the effluvia given off by his body.’ (Q.) ‘How cometh hurt to the head?’ (A.) ‘By the introduction of food upon food, before the first be digested, and by satiety upon satiety; this it is that wasteth peoples. He who will live long, let him be early with the morning-meal and not late with the evening-meal; let him be sparing of commerce with women and chary of cupping and blood-letting and make of his belly three parts, one for food, one for drink and the third for air; for that a
