133 NOVUM ORGANUM 



however, of putrid substances displays itself occasionally in 

 a disgusting and strong scent. 



8. The first degree of heat, therefore, in substances 

 which are warm to the human touch appears to be that of 

 animals, and this admits of a great variety of degrees, for 

 the lowest (as in insects) is scarcely perceptible, the highest 

 scarcely equals that of the sun s rays in warm climates and 

 weather, and is not so acute as to be insufferable to the 

 hand. It is said, however, of Constantius, and some others 

 of a very dry constitution and habit of body, that when 

 attacked with violent fevers, they became so warm as to 

 appear almost to burn the hand applied to them. 



9. Animals become more warm by motion and exercise, 

 wine and feasting, venery, burning fevers, and grief. 



10. In the paroxysm of intermittent fevers the patients 

 are at first seized with cold and shivering, but soon after 

 ward become more heated than at first in burning and 

 pestilential fevers they are hot from the beginning. 



11. Let further inquiry be made into the comparative 

 heat of different animals, as fishes, quadrupeds, serpents, 

 birds, and also of the different species, as the lion, the kite, 

 or man; for, according to the vulgar opinion, fishes are the 

 least warm internally, and birds the most, particularly 

 doves, hawks, and ostriches. 



12. Let further inquiry be made as to the comparative 

 heat in different parts and limbs of the same animal; for 

 milk, blood, seed, and eggs are moderately warm, and less 

 hot than the outward flesh of the animal when in motion or 

 agitated. The degree of heat of the brain, stomach, heart, 

 and the rest, has not yet been equally well investigated. 



13. All animals are externally cold in winter and cold 

 weather, but are thought to be internally warmer. 



