NOVUM ORGAN U M&quot;. Ill 



shines in the dark, are warm to the touch. The heat, how 

 ever, of putrid substances displays itself occasionally in a 

 disgusting and strong scent. 



8. The first decree of heat therefore in substances which 

 are warm to the &quot;human touch, appears to be that of ani 

 mals, 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 

 wards 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 investi 

 gated. 



13. All animals are externally cold in winter and cold 

 weather, but are thought to be internally warmer. 



14. The heat of the heavenly bodies, even in the warmest 

 climates and seasons, never reaches such a pitch as to light 

 or burn the dryest wood or straw, or even tinder without 

 the aid of burning glasses. It can, however, raise vapour 

 from moist substances. 



15. Astronomers tell us that some stars are hotter than 

 others. Mars is considered the warmest after the sun, then 

 Jupiter, then Venus. The moon and, above all, Saturn are 

 considered to be cold. Among the fixed stars, Sirius is 

 thought the warmest, then Cor Leonis, or Regulus, then the 

 lesser dog-star. 



