Here you can download A Lecture on the Preservation of Health Pdf book free online – from A Lecture on the Preservation of Health Pdf book; Let us next consider the matter of heat: suppose water to be heated lukewarm, if you put one hand into it, it will feel warm; if you now put the other hand into water, heated for instance to 120 degrees or 130 degrees, and keep it there some time, we will say, two minutes;