NOVUM ORGAXLM. 329 



easily ; while in the case of the iron the entrance is made roughly, 

 and is accompanied by a struggle, the parts of the iron possessing 

 greater obstinacy. 



It is shown also, to a certain extent, in some gangrenes and morti 

 fication of the llesh, which do not excite great lic.it or pain on account 

 of the subtlety of the putrefaction. 



And let this be the First Vintage, or Commencement of Interpreta 

 tion, concerning the Form of Heat made by the Permission of the 

 L nderstiindin ^. 



Now, from this First Vintage the Form, or true Definition of Heat 

 (that, I mean, which bears relation to the universe, and is not merely 

 relative to the senses) is described in a few words, thus : Heat is 

 motion expansive, restrained, and struggling through the lesser parts 

 of a body. And the expansion is modified ; though expanding all 

 U avs, it yet has an upward direction. Moreover, the struggle 

 through the parts is also modified ; ; / is not at all sluggish, but 

 hurried, and accompanied with violence. 



And as regards the practical side, it is the same thing. For the 

 designation is as follows : Jf in any natural body you can excite 

 motion of self-dilation or expansion, and can so repress that motion 

 and turn it upon itself that the dilation shall not proceed equally, but 

 shall gain ground in part, and be repelled in part, beyond doubt you 

 loill generate heat ; not taking into consideration whether the body be 

 elementary (as they say) or indued with celestial properties ; whether 

 it be luminous or opaque ; rare or dense ; locally expanded, or con 

 tained within the bounds of its first dimension ; tending to dissolu 

 tion, or remaining as it was; whether it be animal, vegetable, or 

 mineral ; whether it be water, oil, or air, or any other substance what 

 ever susceptible of the motion aforesaid. And sensible heat is the 

 same thing, but viewed with relation to the senses. 15ut now we must 

 proceed to further aids. 



xxi. Having considered the Tables of First Presentation and 

 Rejection or Exclusion, and having completed the I- irst Vintage in 

 accordance with them, we must advance to the other aids of the 

 Understanding for the Interpretation of \ature and a true and 

 perfect Induction. In preparing which we shall proceed, when tables 

 are required, upon the Instances of Heat and Cold ; but where only 

 a few examples are required, we shall proceed at large with other 

 subjects, so as to keep our inquiry free from confusion, and yet not 

 draw too closely the limits of our teaching. 



\Ve shall speak therefore, firstly, of Prerogative Instances ; secondly, 

 of the Supports of Induction; thirdly, of the Rectification of Induc 

 tion ; fourthly, of the Variation of Inquiry according to the Nature of 

 the Subject; fifthly, tot Prerogative Natures, with reference to Inquiry, 

 or of what is to be inquired first, and what afterwards; sixthly, of the 

 Limits of Inquiry, or of the Synopsis of all A afitrcs in tlie Universe ; 

 seventhly, of Deduction to Practice, or of what exists relatively to man ; 

 eighthly, of Preparations for Inquiry; and lastly, of the Ascending 

 and Descending Scale of Axioms. 



