LIB. II. 47,48. 289 



Denique in omni inquisitione naturae, quantum cor- 

 poris requiratur ad aliquod effectum, tanquain dosis, 

 notandum ; et cautiones de nimis et parum asper- 

 gendse. 



XLVIII. 



Inter prcerogativas instantiarum, ponemus loco vice- 

 simo quarto instantias luctce, quas etiam instantias prce- 

 dominantice appellare consuevimus 66 . Eae indicant 

 prsedominantiam ct cessionera virtutum ad invicem ; 

 et quse ex illis sit fortior et vincat, qusc infirmior et 

 succumbat. Sunt enim motus et nixus corporum com- 

 positi, decompositi, et complicati, non minus quam 

 corpora ipsa. Proponemus igitur primum species prac- 

 cipuas motuum sive virtutum activarum ; ut niagis 

 perspicua sit ipsarum comparatio in robore, et exinde 

 demonstratio atque designatio instantiarum luctce et 

 prcedominantice. 



(1.) Motus primus sit motus antitypice 67 materiae, 

 quae inest in singulis portionibus ejus ; per quern plane 

 annihilari non vult ; ita ut nullum incendium, nullum 

 pondus, aut depressio, nulla violentia, nulla denique 

 aetas aut diuturnitas temporis possit redigere aliquam 

 vel minimam portionem materiae in nihilum, quin ilia 

 et sit aliquid, et loci aliquid occupet, et se, (in quali- 

 cunque necessitate ponatur) vel formam mutando vel 



66 By an oversight Bacon gives vague and improper manner in- 

 the same second name to these In- eluding under it tendencies to re- 

 stances as he does to the third class, sistance and inertia, and the resist- 

 viz. &quot; Instantiae ostensivse quas ance to annihilation which is found 

 etiam elucescentias, sive instantias in all substances. Motion (so far 

 liberatas et pradominantes, appel- as so simple an operation can be 

 lare consuevimus.&quot; II. 24. In call- denned) is rightly denned by Epi- 

 ing these instances of Resistance, curus as &quot; Change of Place.&quot; 

 Bacon does well enough : but when 67 Antitypice. The indestructi- 

 he gives to them all the generic bility of Matter a property (as far 

 name of Motus, it is not so well, as we know) universal. 

 For he uses the term in a very 



U 



