Sentence:  Fourthly, The proper use of ayre attracted by the lungs, and without which there is no durable continuation in life, is not the nutrition of parts, but the <WSD>contemperation</WSD> of that fervour in the heart, and the ventilation of that fire alwaies maintained in the forge of life; 
Meaning of the word marked with <WSD> tags:  The act of tempering or moderating.