CLASS IV. 1. 1. 2, OF ASSOCIATION 360 



is explained in Sect. XXXV. 1. In the beginning of intoxica- 

 tion the whole skin becomes florid from the association of the ac- 

 tions of the cutaneous arteries with those of the stomach, be- 

 cause vinous spirit excites the fibres of the stomach into more 

 violent action than the stimulus of common food; and the cu- 

 taneous capillaries of the face, from the more frequent expo* 

 sure to the vicissitudes of cold and heat, possess more mobility or 

 irritability than those of other parts of the skin, as further ex- 

 plained in Sect. XXXIII. 2. 10, Vinegar is liable to produce 

 this flushing of the face, which probably is owing to the quan- 

 tity of vinous spirit it contains, as I believe the unfermented ve- 

 getable acids do not produce this effect. In every kind of blush 

 the arterial blood is propelled into the capillaries faster than the 

 venous absorption can carry it forwards into the veins, in this 

 respect resembling the tensio phalli. 



Can the beginning vinous or acetous fermentation of the ali- 

 ment in weak stomachs contribute to this effect? or is it to be 

 ascribed to the greater power of association between the arteries 

 of the face and the fibres of the stomach in some people than in 

 others? 



M. M. Eat and drink less at a time, and more frequently. 

 Put 20 drops of weak acid of vitriol into water to be drunk at 

 meals. Let the dress over the stomach and bowels be loose, 

 Use no fermented liquors, or vinegar, or spice. 



2. Sudor stragulis immersorum. Sweat from being covered in 

 bed. In the commencement of an epidemic fever, in which the 

 perpetual efforts to vomit was a distressing symptom, Dr. Syd- 

 enham discovered, that if the patient's head was for a short time 

 covered over with the bed-clothes, warmth was produced, and 

 a sweat broke out upon the skin, and the tendency to vomit ceas- 

 ed. In this curious fact two trains of associated motions are 

 excited into increased action. First, the vessels of the lungs are 

 known to have their motion associated with those of the skin by 

 the difficulty of breathing on going into the cold bath, as describ* 

 ed in Sect. XXXII. 3. 2. Hence, when the vessels of the 

 lungs become excited into stronger action, by the bad air under 

 the bed-clothes, warmed and adulterated by frequent breathing, 

 those of the external skin soon become excited by their associa- 

 ation into more energetic action, and generate more heat along 

 with a greater secretion of perspirable matter. Secondly, the 

 sympathy between the stomach and skin is evident in variety of 

 circumstances; thus the cold air of frosty days applied to the 

 skin for a short time increases the action of the stomach by re- 

 verse sympathy, but decreases it if continued too long by direct 

 sympathy: so in the circumstance above mentioned, the action 



VOL, ii, SB 



