Dr. Conner to Mr. Ray. 29 y 



have generally lefler heat in their Blood, and a flower 

 Circulation and Pulfe, and are lefs fubjed to Fevers, 

 than Perfons that are dry and lean, I mean the bilious. 

 I find that in moftChymical Fermentations Sulphur is 

 far from encreafing motion and heat, it rather retards 

 it by involving the faline Principles, which are the 

 true caufe of fermentation and heat. I confider, like- 

 wife, that if there was any thiijg of the nature of a 

 Flame in the Blood , it would only be in the Lungs 

 where it meets the Air s but when once it would pafs 

 from the Lungs into the Heart, and into the narrow 

 paflages of the Veins and Arteries, it could no more 

 flame than a lighted Candle pafs'd into the deep 

 mouth of a hollow Candleftick. Befides, I cannot 

 believe that the Air is an aliment to our common 

 Flame, no more than by its preflure and elafticity in 

 keeping and crouding together into a Vertex the ig- 

 neous Particles, as I have hinted in the Treatife De 

 Jfntris Lethiferis. For I cannot conceive how the 

 Air that comes to the mouth of an Oven can ferve 

 * for a Pabulum to the Flame which is in the bottom 

 of the Oven, for it cannot 'come near its fo that I 

 am apt to believe that the Candle goes out in the air 

 Pump, only becaufe the Air being exhaufted, there 

 remains nothing to keep together the flying parts of 

 the Candle, and fo they foon vanifh away * not be- 

 caufe there wants a pabulum of Air or Nitre, fincc 

 the fulphureous parts of the Candle it felf are pabu- 

 •lum enough. 



Frpm thefe and feveral other Reafons I have con- 

 cluded that the inteftine Motion of the Blood is a true 

 fermentation arifing from the ^niggling ^of its faline 

 Parts, and mitigated by its fulphureous ones, like 

 the fermentation of Beer, Wine, or Syder, though 

 in a higher degree. This fermentation caufes heat in 

 the Blood, this heat expands and rarifies the Air that 

 comes in by refpiration : The expanded Air expands re- 

 ciprocally the Blood , and makes it frothy, thin and 



florid: 



