476 NOVUM ORGANUM. [EOOK II. 



water, oil, air, Ac.) by mere approximation to tlie iire or any 

 Marm body, reject all variety and delicate texture of bodies. 



4. On account of iron and ignited metals, which warm other 

 bodies, and yet neither lose their weight nor substance, reject 

 the imparting or mixing of the substance of the heating body. 



5. On account of boiling \vater and air, and also those metals 

 and other solid bodies wliich are heated, but not to ignition, or 

 red heat, reject flame or light. 



6. On account of the rays of the moon and other heavenly 

 bodies (except the sun), again reject flame or light. 



7. On account of the comparison between red-hot iron and the 

 flame of spirits of wine (for the iron is more hot and less briglit, 

 whilst the flame of spirits of wine is more bright and less hot), 

 again reject flame and light. 



8. On account of gold and other ignited metals, which are of 

 the greatest specific density, reject rarity. 



9. On account of air, wliich is generally found to be cold and 

 yet continues rare, reject rarity. 



10. On account of ignited iron,** which does not swell in bulk, 

 but retains the same apparent dimension, reject the absolute 

 expansive motion of the whole. 



11. On account of the expansion of the air in thermometers 

 and the like, which is absolutely moved and expanded to the eye, 

 and yet acquires no manifest increase of heat, again reject 

 absolute or expansive motion of the whole. 



12. On account of the ready application of heat to all sub- 

 stances without any destruction or remarkable alteration of them, 

 reject destructive nature or the violent communication of any 

 new nature. 



13. On account of the agreement and conformity of the effects 

 produced by cold and heat, reject both expansive and contracting 

 motion as regards the whole. 



14. On account of the heat excited by friction, reject principal 

 nature, by which we mean that which exists positively, and is 

 not caused by a preceding nature. 



There are other natures to be rejected ; but we are merely 

 offering examples, and not perfect tables. 



None of the above natures are of the form of heat ; and man 

 is freed from them all in his operation upon heat. 



XIX. In the exclusive table are laid the foundations of true 

 induction , which is not, however, completed until the afliniiaTTvcT 

 be attaiE^d. !Nor is the exclusive table perfect, nor can it be eo 

 at first. Por it is clearly a rejection of simple natures ; but if we 

 have not as yet good and just notions of simple natures, how can 

 the exclusive table be made correct ? Some of the above, as the 



• This is erroneous, — all metals expand considerably when heat 



