§　205。
  Matter；　as　having　gravity；　is　only：　（1）　matter　existing　in　itself　or　general。　But　this　concept　must：　（2）
  specify　itself；　thus　it　is　elementary　matter；　and　the　object　of　elementary　physics。　（3）　Particular
  matter　taken　together　is　individualised　matter；　and　the　object　of　physics　as　the　actual　world　of　the
  body。
  A。
  Mechanics
  §　206。
  Matter；　as　simply　general；　has　at　first　only　a　quantitative　difference；　and　particularises　itself　into
  different　quanta；　…　masses；　which；　in　the　superficial　determination　of　a　whole　or　one；　are　bodies。
  §　207。
  The　body　is：　（1）　as　heavy　matter　the　solid　identity　of　space　and　time；　but　（2）　as　the　first　negation　it
  has　in　itself　their　ideality；　which　differentiates　them　from　each　other　and　from　the　body。　The　body　is
  essentially　in　space　and　time；　of　which　it　constitutes　its　indifferent　content　in　contrast　to　this　form。
  §　208。
  （3）　As　space；　in　which　time　is　suspended；　the　body　is　enduring；　and　（4）　as　time；　in　which　the
  indifferent　subsistence　of　space　is　suspended；　the　body　is　transitory。　In　general；　it　is　a　wholly
  contingent　unit。　（5）　But　as　the　unity　which　binds　together　the　two　moments　in　their　opposition；　the
  body　essentially　has　motion；　and　the　appearance　of　gravity。
  Because　the　forces　have　been　seen　as　only　implanted　onto　matter；　motion　in　particular　is
  considered　to　be　a　determination　external　to　the　body；　even　by　that　physics　which　is　presumably
  scientific。　It　has　thus　become　a　leading　axiom　of　mechanics　that　the　body　is　set　in　motion　or　placed
  into　a　condition　only　by　an　external　cause。　On　the　one　hand　it　is　the　understanding　which　holds
  motion　and　rest　apart　as　nonconceptual　determinations；　and　therefore　does　not　grasp　their
  transition　into　each　other；　but　on　the　other　hand　only　the　selfless　bodies　of　the　earth；。　which　are　the
  object　of　ordinary　mechanics；　appear　in　this　representation。　The　determinations；　which　occur　in　the
  appearance　of　such　bodies　and　are　valid；　are　set　as　the　foundation；　and　the　nature　of　the
  independent　bodies　is　subsumed　under　this　category。　In　fact；　however；　the　latter　are　truly　more
  general　and　the　former　is　that　which　is　subsumed　absolutely；　and　in　absolute　mechanics　the
  concept　presents　itself　in　its　truth　and　singularity。
  §　209。
  In　motion；　time　posits　itself　spatially　as　place；　but　this　indifferent　spatiality　becomes　just　as
  immediately　temporal：　the　place　becomes　another　（cf　§　202）。　This　difference　of　time　and　space　is；
  as　the　difference　of　their　absolute　unity　and　their　indifferent　content；　a　difference　of　bodies；　which
  hold　themselves　apart　from　each　other　yet　equally　seek　their　unity　through　gravity；　—　general
  gravitation。
  §　210。
  Gravitation　is　the　true　and　determinate　concept　of　material　corporeality；　which　is　thereby　just　as
  essentially　divided　into　particular　bodies；　and　which　has　its　manifested　existence；　the　moment　of
  external　individuality；　in　movement；　which　is　thus　determined　immediately　as　a　relation　of　several
  bodies。
  General　gravitation　must　be　recognised　for　itself　as　a　profound　thought；　which　constitutes　an
  absolute　basis　for　mechanics　if　it　is　conceived　initially　in　the　sphere　of　reflection；　though　it　is　so
  bound　up　with　it　through　the　quantitative　determinations　that　it　has　attracted　attention　and　credit；
  and　its　verification　has　been　based　solely　on　the　experience　analysed　from　the　solar　system　down
  to　the　phenomenon　of　the　capillary　tubes。　Certainly　gravitation　directly　contradicts　the　law　of
  inertia；　for；　by　virtue　of　the　former；　matter　strives　to　get　out　of　itself　to　another。　In　the　concept　of
  gravity；　as　has　been　shown；　there　are　included　the　two　moments　of　being　for　itself　and　of　that
  continuity　that　suspends　being　for　itself　These　moments　of　the　concept　now　experience　the　fate；　as
  particular　forces　corresponding　to　the　power　of　attraction　and　repulsion；　of　being　conceived　more
  precisely　as　the　centripetal　and　the　centrifugal　forces；　which　are　supposed；　like　gravity；　to　act　on
  bodies；　and　independently　of　each　other　and　contingently；　to　meet　together　in　a　third　entity；　the
  body。　In　this　way　whatever　profundity　was　contained　in　the　thought　of　general　gravitation　is
  destroyed　again；　and　the　concept　and　reason　will　be　unable　to　penetrate　into　the　theory　of
  absolute　motion；　as　long　as　the　vaunted　discoveries　of　forces　prevail　there。
  if　one　closely　considers　the　quantitative　determinations　which　have　been　identified　in　the　laws　of
  the　centripetal　and　the　centrifugal　forces；　one　very　quickly　discovers　the　confusion　which　emerges
  from　their　separation。　This　confusion　becomes　even　greater　if　the　separation　is　mentioned　in
  relation　to　gravitation；　gravitation；　also　called　attraction；　then　seems　to　be　the　same　as　centripetal
  force；　the　law　of　this　individual　force　is　taken　as　the　law　of　the　whole　of　gravitation；　and　the
  centrifugal　force；　which　at　another　time　is　valued　as　thoroughly　essential；　is　viewed　as　something
  quite　superfluous。…In　the　above　proposition；　which　contains　the　immediate　idea　of　gravitation；
  gravity　itself　namely；　as　the　concept；　which　shows　itself　in　the　particularity　of　the　body　through　the
  external　reality　of　motion；　the　rational　identity　and　inseparability　of　these　two　moments　are
  contained。…The　relativity　of　motion　also　shows　itself　in　this　proposition；　which　only　makes　sense　in
  a　system　of　several　bodies　standing　in　relation　to　each　other　in　accordance　with　a　varied
  determination；　so　that　a　different　determination　will　immediately　result。
  §　211。
  The　particular　bodies　in　which　gravity　is　realised　have；　as　the　determinations　of　their　different
  natures；　the　moments　of　their　concept。　One　body；　therefore；　is　the　general　centre　of　being　in　itself。
  Opposing　this　extreme　stands　individuality；　existing　outside　of　itself　and　without　a　centre。　But　the
  particular　bodies　are　others；　which　stand　in　the　determination　of　being　outside　of　themselves　and
  are　at　the　same　time；　as　being　in　themselves；　also　centres　for　themselves；　and　are　related　to　the
  first　body　as　to　their　essential　unity。
  §　212。
  （1）　The　motion　of　bodies　of　relative　centrality；　in　relation　to　bodies　of　abstract；　general　centrality；
  is　absolutely　free　motion；　and　the　conclusion　of　this　system　is　that　the　general　central　body　is
  brought　together　through　relative　centrality　with　dependent　corporeality。
  As　is　well…known；　the　laws　of　absolutely　free　motion　were　discovered　by　Kepler；　a　discovery　of
  immortal　fame。　Kepler　proved　them；　too；　in　the　sense　that　he　found　the　general　expression　for　the
  empirical　data　（cf　§　145）。　Since　then　it　has　become　a　commonplace　that　Newton　first　found　the
  proofs　of　these　laws。　Not　often　has　fame　been　more　unjustly　transferred　from　the　first　discoverer
  to　another。　Here　I　only　want　to　point　out　what　has　basically　already　been　admitted　by
  mathematicians；　namely：　（1）　that　the　Newtonian　formulas　can　be　derived　from　Keplerian　laws；　（2）
  that　the　Newtonian　proof　of　the　proposition　that　a　body　governed　by　the　law　of　gravitation　moves
  in　an　ellipse　around　the　central　body　proceeds　in　general　in　a　conic　section；　whereas　the　main　point
  that　was　to　be　proven　consists　precisely　in　this；　that　the　course　of　such　a　body　is　neither　a　circle
  nor　any　other　conic　section；　but　solely　the　ellipse。　The　conditions　which　make　the　course　of　the
  body　into　a　specific　conic　section　are　referred　back　to　an　empirical　condition；　namely；　a　particular
  situation　of　the　body　at　a　specific　point　in　time；　and　to　the　contingent　strength　of　an　impulse　which
  it　is　supposed　to　have　received　at　the　beginning。　（3）　Newton's　'law〃　of　the　force　of　gravity　has
  likewise　only　been　demonstrated　inductively　from　experience。
  On　closer　inspection　it　appears　that　what　Kepler；　in　a　simple　and　sublime　manner；　articulated　in
  the　form　of　laws　of　celestial　motion；　Newton　converted　into　the　nonconceptual；　reflective　form　of
  the　force　of　gravity。　The　whole　manner　of　this　〃proof〃　presents　in　general　a　confused　tissue　of　lines
  of　merely　geometrical　construction　to　which　a　physical　meaning　of　independent　forces　is　given；　of
  the　empty　concepts　of　the　understanding　of　a　force　of　acceleration；　of　particles　of　time；　at　whose
  beginning　those　forces　always　play　a　renewed　role；　and　of　a　force　of　inertia；　which　presumably
  continues　its　previous　effect；　and　so　on。　A　rational　proof　of　the　quantitative　determinations　of　free
  motion　can　only　rest　on　the　determinations　of　the　concepts　of　space　and　time；　the　moments　whose
  relation　is　motion。
  §　213。
  （2）　The　absolute　relation　of　those　dependent　bodies；　which　are　merely　the　extreme　of　the　being
  outside　of　itself　of　gravity　and　therefore　lack　their　own　centrality　to　their　relative　central　bodies；　is
  the　residual　element　of　their　gravity　in　them；　which　because　of　physical　being　outside　of　themselves
  is　mere　striving　and；　therefore；　a　pressure　directed　tow