9 2 BACON 



motion of sympathy and antipathy ; 8. Disponent motion, with 

 regard to the just placing of parts in the whole ; 9. Motion of 

 assimilation, or multiplicative of its own nature upon another 

 body ; 10. Motion of excitation, where the noble agent excites 

 the latent and benumbed motion in another thing ; 1 1. Motion 

 of the seal, or impression, by an operation without communica- 

 tion of substance; 12. Regal motion, or the restraint of other 

 motions by a predominant one; 13. Endless motion, or spon- 

 taneous rotation ; 14. Motion of trepidation, or the motion of 

 systole and diastole, with regard to bodies placed betwixt 

 things advantageous and hurtful; 15. And lastly, Motion 

 couchant, or a dread of motion, which is the cause of many 

 effects. And such are the simple motions that really proceed 

 out of the inward recesses of nature ; and which being com- 

 plicated, continued, used alternately, moderated, repeated, and 

 variously combined, produce those compound motions or re- 

 sults of motion we call generation, corruption, increase, dim- 

 inution, alteration, translation, mixtion, separation, and con- 

 version. 



The measures of motions are an attendant on physics, as 

 showing the effects of quantity, distance, or the sphere of activ- 

 ity, intension and remission, short and long continuance, activ- 

 ity, dulness, and incitation. And these are the genuine parts of 

 abstract physics, which wholly consists i. In the schemes of 

 matter ; 2. Simple motions ; 3. The results or sums of motions ; 

 and, 4. The measures of motions. As for voluntary motion in 

 animals the motion in the action of the senses, the motions 

 of the imagination, appetite, and will, the motion of mind, the 

 determination, and other intellectual faculties they have 

 their own proper doctrines under which we range them, con- 

 fining the whole of physics to matter and efficient, and assign- 

 ing over forms and ends to metaphysics. 



We must annex two remarkable appendages to physics, with 

 regard rather to the manner, than the matter of inquiry ; viz., 

 natural problems, and the opinions of the ancient philosophers. 

 The first is an appendage of nature at large, and the other of 

 nature united or summed up ; both relating to a diligent kind 

 of doubting, which is no contemptible part of knowledge. 

 Now, problems contain particular doubts and opinions, gen- 

 eral ones, as to principles and structure. In the books of Aris- 

 totle we have a noble example of problems, deserving not only 



