4 So THEORY OF FEVER. SUP. I. 11. 7. 



covering the head in bed in a fliort time relieved the pertina- 

 cious ficknefs of the patient, it in nil be obferved, that when the 

 action of the heart and arteries becomes weakened by the want 

 of the due ftimulus of the proper quantity of oxygen in the 

 blood, an accumulation of the fenforial power of irritation oc- 

 curs in the fibres of the heart and arteries, which then is ex- 

 pended on thofe of the capillary glands, increafing their actions 

 and confequent fecretions and heat. And then the flornach is 

 thrown into flronger action, both by the greater excitement of 

 its natural quantity of the fenforial power of afibciation by the 

 increafed actions of the capillaries, and alfo by fome increafe of 

 aflbciability, as it had been previoufly a long time in a Mate of 

 torpor, or lefs activity than natural, as evinced by its perpetual 

 ficknefs. 



In a manner fomewhat ilmilar to this, is the rednefs of the 

 Ikin produced in angry people by the fuperabundance of the un- 

 employed fenforial power of volition, as explained in Clafs IV. 

 2. 3. 5. Rubor ex irft. From hence we learn how, when 

 people in fevers with weak pulfe, or in dropfies, become infane, 

 the abundance of the unemployed fenforial power of volition 

 increafes the actions of the whole moving fyftem, and cures 

 thofe difeafes. 



7. As the orgafm of the capillaries in fevers with weak pulfe 

 is immediately caufed by the torpid actions of the heart and ar- 

 teries, as above explained, this fupplies us with,another indica- 

 tion 'of cure in fuch fevers, and that is to (limulate thefe organs. 

 This may probably be done by fome kind of medicines, which 

 are known to pafs into the blood unchanged in fome of their 

 properties. It is poffibie that nitre, or its acid, may pafs into the 

 blood and increafe the colour of it, and thus increafe its ftimu- 

 lus, and the fame may be fuppofed of other falts, neutral or me- 

 talic ? As rubia tinctoria, madder, colours the bones of young 

 animal Sj it muft pafs into the blood with its colouring matter 

 at leait unchanged, and perhaps many other medicines may 

 iikewife affet the blood, and thus act by ftimulating the heart 

 and arteries, as well as by ftimulating the ftomach ; which cir- 

 cumftance deferves further attention. 



Another way of immediately ftimulating the heart and arte- 

 ries would be by transfufing new blood into them. Is it pofliblc 

 that any other .fluid befides blood, as chyle, or milk, or water, 

 could, if managed with great art, be introduced fafely or advan- 

 tageoufly into the vein of a living animal ? 



"A third method of exciting the heart and arteries immediate- 

 ly is by increafing the natural ftimulus of the blood, and is well 

 worthy experiment in all fevers with weak pulfe j and that con- 

 fids 



