Sentence:  And if we examine how this heat is communicated to the other members, must we not avow that 'tis by means of the bloud, which passing the heart, <WSD>reheats</WSD> it self there, and thence disperseth it self thorow the whole body: 
Meaning of the word marked with <WSD> tags:  To heat something after it has cooled off, especially previously cooked food ("also in figurative senses").