St*. I. 6. 4, THEORY OF FEVER. 457 



sympathy; hence pale urine is made after a full dinner, as 

 less of the aqueous part of it is imbibed by the urinary lym- 

 phatics; and hence the water in anasarca of the lungs and limbs 

 is speedily absorbed, when the actions of the lacteals of the sto- 

 mach or intestines are weakened or inverted by the exhibition 

 ef those drugs which produce nausea, or by violent vomiting, or 

 violent cathartics. 



Hence in diabetes the lacteal system acts strongly, at the same 

 time that the urinary lymphatics invert their motions, and trans- 

 mit the chyle into the bladder; and in diarrhoea from crapula, or 

 too great a quantity of food and fluid taken at a time, the lacteals 

 act strongly, and absorb chyle or fluids from the stomach and 

 upper intestines; while the lymphatics of the lower intestines 

 revert their motions, and transmit this over-repletion into the 

 lower intestines, and thus produce diarrhoea; which accounts for 

 the speedy operation of some cathartic drugs, when much fluid is 

 taken along with them. 



4. Other circles of irritative associate motions of great impor- 

 tance, are those of the secreting system; of these are the motions 

 of the larger congeries of glands, which form the liver, spleen, 

 pancreas, gastric glands, kidneys, salivary glands, and many 

 others; some of which act by direct, and others by reverse sym- 

 pathy, with each other. Thus, when the gastric glands act most 

 powerfully, as when the stomach is filled with food, the kidneys 

 act with less energy; as is shewn by the small secretion of urine 

 for the first hour or two after dinner; which reverse sympathy is 

 occasioned by the greater expenditure of sensorial power on the 

 gastric glands, and to the newly absorbed fluids not yet being 

 sufficiently animalized, or otherwise prepared, to stimulate the 

 secretory vessels of the kidneys. 



But those very extensive glands, which secrete the perspirable 

 matter of the skin and lungs, with the mucus, which lubricates 

 all the internal cells and cavities of the body, claim our particu- 

 lar attention. These glands, as well as all the others, proceed 

 from the capillary vessels which unite the arteries with the 

 veins, and are not properly a part of them; the mucous and per- 

 spirative glands, which arise from the cutaneous and pulmonary 

 capillaries, are associated by direct sympathy; as appears from 

 immersion in the cold bath, which is therefore attended with a 

 temporary difficult respiration; while those from the capillaries 

 of the stomach and heart and arteries, are more generally asso- 

 ciated by reverse sympathy with those of the cutaneous capilla- 

 ries, as appears in fevers with weak pulse and indigestion, and 

 at the same time with hot and dry skin. 



The disturbed actions of this circle of the associate motions of 

 VOL. n. 3 N 



