apt to alter the natural temper of a particular Creature, and many times so as to cause a total dissolution of its in∣terior natural figure; (when I name extreams, I do not mean any uttermost extreams in Nature; for Na∣ture being Infinite, and her particular actions being poised and ballanced by opposites, can never run into extreams; but I call them so in reference onely to our perception, as we use to say, it is extream hot, or ex∣tream cold) And the reason of it is, that Water by its natural perceptive motions imitates the motions of heat or cold, but being kept from the perception of them, it cannot imitate them. The same reason may be given upon the experiment, that some bodies being put into water, will be preserved from being frozen or congealed; for they being in water, are not onely kept from the perception of cold, but the water doth as a guard preserve them; which guard, if it be overcome, that is, if the water begin to freeze, then they will do so too. But yet all colds are not airy, nor all heats sunny or fiery; for a man, as I mentioned before, may have shaking fits of an Ague in the hottest climate, or season, and burning fits of a Fever in the coldest cli∣mate or season; and as there is difference between ele∣mental and animal cold and heat, so betwixt other sorts; so that it is but in vain to prove all sorts of heat and cold by Artificial Weather-glasses, suppressions and eleva∣tions of water, Atmosphaerical parts, and the like; for it is not the air that makes all cold, no not that cold 0