152 NOVUM ORGANUM 



we are wont to call the liberty of the understanding, or the 

 commencement of interpretation, or the first vintage. 



The First Vintage of the Form of Heat 



It must be observed that the form of anything is inherent 

 (as appears clearly from our premises) in each individual in 

 stance in which the thing itself is inherent, or it would not 

 be a form. No contradictory instance, therefore, can be al 

 leged. The form, however, is found to be much more con 

 spicuous and evident in some instances than in others; in 

 those (for example) where its nature is less restrained and 

 embarrassed, and reduced to rule by other natures. Such 

 instances we are wont to term coruscations, or conspicuous 

 instances. We must proceed, then, to the first vintage of 

 the form of heat. 



From the instances taken collectively, as well as singly, 

 the nature whose limit is heat appears to be motion. This 

 is chiefly exhibited in flame, which is in constant motion, 

 and in warm or boiling liquids, which are likewise in con 

 stant motion. It is also shown in the excitement or increase 

 of heat by motion, as by bellows and draughts: for which 

 see Inst. 29, Tab. 3, and by other species of motion, as in 

 Inst. 28 and 31, Tab. 3. It is also shown by the extinction 

 of fire and heat upon any strong pressure, which restrains 

 and puts a stop to motion; for which see Inst. 30 and 32, 

 Tab. 3. It is further shown by this circumstance, namely, 

 that every substance is destroyed, or at least materially 

 changed, by strong and powerful fire and heat: whence it is 

 clear that tumult and confusion are occasioned by heat, to 

 gether with a violent motion in the internal parts of bodies; 

 and this gradually tends to their dissolution. 



What we have said with regard to motion must be thus 



