33 



ii^que ceiilin solis el planelartim, sine virluli;» iliiiiimiliune; 

 qiiaeque ngil non pro quantilate siiperQcierum parliciilaruin, in 

 qtius agil (ut solent causae mechanicac), sed pro quanlilale tna- 

 icriae solidae. — Ralionem harum gravilatis proprit-talum ex 

 phacnoincnis noudum potui deducere el liypolheses nou (Ingo. 

 Salis esl quod gravilas revera cxistat et agal secundiini loges a 

 nobis expositas. ^^etvto», Principia Phil. nat. p. 676. — 

 To teil US Ihat ovcry species of things is endow'd wilh an occult 

 ipeciUck qualily by Avbich il acls and produces manilest etlccls, 

 is lo teil US nothing: bul lo dorivc two or ihrec general prin- 

 ciples of molion from phaenomena, and allerwards lo lell us how 

 Ihe propcrlies and aclions of all corporcal things follow from 

 those manifest principics, would bc a very greal step in Philo- 

 sophy, though the causes of ihose principles were not yet dis- 

 covcred : and thcrefore 1 scruplc not lo propose Ihe principics of 

 molion and leave Iheir causes lo be found out. 9ie>wton, 

 üpticks p. 377. grüljer, Query 31 p. 351, l)ei^t eö: JJodies 

 acl one upon anolhcr by Ihe attraction of gravily, magnetism 

 and olcctricily. and it is not improbable Ihat ihere may bc more 

 attraclive powcrs Ihan thesc. How ihesc attraclions may be per- 

 formed, 1 do not höre consider. What I call attraction, may be 

 pcrformed by Impulse or by some olher mcans unknown to me. 

 I usc Ihal Word here lo signify only in general any force l)y which 

 bodics tcnd lowards one anolher, whatsoever be the cause. 



*' (©. 23.) 1 suppose Ihe rarer aclher wilhin bodies and 

 the denser without Iheni. Oper um N e w t o n i Tomus IV. (ed. 

 1782 öam. Jpor^lep) p. 3SG, mit ^2IuiveiibunA «uf tie erflarung 

 bet von ©rtnialbt eutbed'ten 2)tiTractiüu ober gtdjtbeugim^. »Um 

 ©d^luiTe beö 23rtffeö von OZcivton an Oiobert 33üple vom Jebr. 1678 

 p. 394 l)fi^t e6: 1 shall sei down one conjecture more which came 



inio my mind: it is about the cause of gravily 9(ud) Me 



(^orrefponbenj mit Olbenburg vom December 1675 beroeijl, ba^ 

 ber gro^e ?DJann bamal^ bew 'ilettjiv ■■ y?)^\>otl)eU\\ nidjt abgeneigt 

 war. TiiXd) biefen foüre tet ©top be-j materiellen 2id>te^ ben 

 »i(etl)er in Ö(f)ivin9un9 iet^exi; bie Sc^aungungen be^ ^^etiievi allein, 

 weKter ^i?envanbtf(f)afr mir einem ^Jerven-^lnibum i)at, erjeugten 

 nid)t l!ix6 gid)r. (5. über ben (gtreit mir j)cofe J^orölev 1'. IV- 

 p. 378 - 380. 



Ol V. .»>)im('oltt, i\oÄnu«a. III 3 



