| <s>Similiter cum &longs;it, vt BA ad AE, ita CA <lb/>ad AF, etiam BC, EF inter&longs;e æquidi&longs;tabunt, &longs;eu ad hori­<lb/>zontem æqualiter inclinabuntur, eruntque in ratione ea­<lb/>dem, ac BA ad AE. </s> | <s>Similiter cum &longs;it, vt BA ad AE, ita CA <lb/>ad AF, etiam BC, EF inter&longs;e æquidi&longs;tabunt, &longs;eu ad hori­<lb/>zontem æqualiter inclinabuntur, eruntque in ratione ea­<lb/>dem, ac BA ad AE. </s> |
| <s>Idemque o&longs;tenditur de chordis CD, <lb/>FG, quare ex magni Galilei &longs;ententia de motu naturaliter <lb/>accelerato indubitanter &longs;equitur tempus decur&longs;us &longs;phæræ <lb/>grauis ex B in D per binas chordas BC, CD ad tempus <lb/>decur&longs;us per vnicam BD, e&longs;&longs;e vt tempus decur&longs;us grauis <lb/>&longs;phæræ ex E in G per binas EF, FG ad tempus decur&longs;us <lb/>per vnicam EG: cadem itidem ratione demon&longs;tratur (an­<lb/>gulis pariter BAC, CAD bifariam &longs;ectis per rectas, quæ <lb/>&longs;imiles arcus BC, EF, ac CD, FG duas in partes diuidant) <lb/>ex quatuor vtrinque arcuum horum cordis, illas inter&longs;e <pb pagenum="57"/>homologas, &longs;imile&longs;que arcus &longs;ubtendentes ad horizonte m <lb/>e&longs;&longs;e æqualiter inclinatas, ac alteram alteri in ratione ea­<lb/>dem, in qua &longs;unt rectæ AB, AE &c: ac propterea ex ea­<lb/>dem Galilei &longs;cientia con&longs;tabit vtique, tempus decur&longs;us ex <lb/>B in C &longs;phæræ grauis B per quatuor chordas quatuor par­<lb/>tes arcus BCD &longs;ubtendentes ad tempus decur&longs;us per vni­<lb/>cam BD, e&longs;&longs;e vt tempus decur&longs;us &longs;phæræ grauis E ex E in <lb/>G per quatuor illis homologas chordas quatuor partes <lb/>arcus EFG pariter &longs;ubtendentes ad tempus decur&longs;us per <lb/>vnicam chordam EG: & hoc &longs;emper ita euenire demon­<lb/>&longs;trabitur quantacunque, & maxima fuerit in perpetua an­<lb/>gulorum bi&longs;ectione æquèmultiplicitas in vtroque arcu <lb/>talium chordarum homologè &longs;umptarum, ac inter&longs;e pro­<lb/>portionalium, æqualiterque ad horizontem inclinatarum: <lb/>Propterquam quòd &longs;emper decur&longs;us ex B in D per aggre­<lb/>gatum chordarum omnium in arcu BCD ad tempus de­<lb/>cur&longs;us per &longs;olam chordam BD e&longs;&longs;e vt tempus decur&longs;us ex <lb/>E in G per aggregatum totidem chordarum in arcu EFG <lb/>ad tempus decur&longs;us per vnicam chordam EG; adeo vt de­<lb/>nique iure optimo educi po&longs;&longs;e videatur, tempus decur&longs;us <lb/>grauis ex B in D per aggregatum infinitarum chordarum <lb/>totum arcum BCD con&longs;tituentium, &longs;eu tempus per ip&longs;um <lb/>arcum BCD ad tempus decur&longs;us per &longs;olam cordam BD <lb/>e&longs;&longs;e vt tempus decur&longs;us grauis ex E in G per aggregatum <lb/>totidem infinitarum chordarum dictis homologè propor­<lb/>tionalium, æqualiterque &longs;ingulæ &longs;ingulis ad horizonte&mtail; <lb/>inclinatarum, ac totum arcum EFG conformantium, &longs;iue <lb/>vt tempus per ip&longs;um arcum EFG per &longs;olam chordam EG. <lb/></s> | <s>Idemque o&longs;tenditur de chordis CD, <lb/>FG, quare ex magni Galilei &longs;ententia de motu naturaliter <lb/>accelerato indubitanter &longs;equitur tempus decur&longs;us &longs;phæræ <lb/>grauis ex B in D per binas chordas BC, CD ad tempus <lb/>decur&longs;us per vnicam BD, e&longs;&longs;e vt tempus decur&longs;us grauis <lb/>&longs;phæræ ex E in G per binas EF, FG ad tempus decur&longs;us <lb/>per vnicam EG: eadem itidem ratione demon&longs;tratur (an­<lb/>gulis pariter BAC, CAD bifariam &longs;ectis per rectas, quæ <lb/>&longs;imiles arcus BC, EF, ac CD, FG duas in partes diuidant) <lb/>ex quatuor vtrinque arcuum horum cordis, illas inter&longs;e <pb pagenum="57"/>homologas, &longs;imile&longs;que arcus &longs;ubtendentes ad horizonte m <lb/>e&longs;&longs;e æqualiter inclinatas, ac alteram alteri in ratione ea­<lb/>dem, in qua &longs;unt rectæ AB, AE &c: ac propterea ex ea­<lb/>dem Galilei &longs;cientia con&longs;tabit vtique, tempus decur&longs;us ex <lb/>B in C &longs;phæræ grauis B per quatuor chordas quatuor par­<lb/>tes arcus BCD &longs;ubtendentes ad tempus decur&longs;us per vni­<lb/>cam BD, e&longs;&longs;e vt tempus decur&longs;us &longs;phæræ grauis E ex E in <lb/>G per quatuor illis homologas chordas quatuor partes <lb/>arcus EFG pariter &longs;ubtendentes ad tempus decur&longs;us per <lb/>vnicam chordam EG: & hoc &longs;emper ita euenire demon­<lb/>&longs;trabitur quantacunque, & maxima fuerit in perpetua an­<lb/>gulorum bi&longs;ectione æquèmultiplicitas in vtroque arcu <lb/>talium chordarum homologè &longs;umptarum, ac inter&longs;e pro­<lb/>portionalium, æqualiterque ad horizontem inclinatarum: <lb/>Propterquam quòd &longs;emper decur&longs;us ex B in D per aggre­<lb/>gatum chordarum omnium in arcu BCD ad tempus de­<lb/>cur&longs;us per &longs;olam chordam BD e&longs;&longs;e vt tempus decur&longs;us ex <lb/>E in G per aggregatum totidem chordarum in arcu EFG <lb/>ad tempus decur&longs;us per vnicam chordam EG; adeo vt de­<lb/>nique iure optimo educi po&longs;&longs;e videatur, tempus decur&longs;us <lb/>grauis ex B in D per aggregatum infinitarum chordarum <lb/>totum arcum BCD con&longs;tituentium, &longs;eu tempus per ip&longs;um <lb/>arcum BCD ad tempus decur&longs;us per &longs;olam cordam BD <lb/>e&longs;&longs;e vt tempus decur&longs;us grauis ex E in G per aggregatum <lb/>totidem infinitarum chordarum dictis homologè propor­<lb/>tionalium, æqualiterque &longs;ingulæ &longs;ingulis ad horizonte&mtail; <lb/>inclinatarum, ac totum arcum EFG conformantium, &longs;iue <lb/>vt tempus per ip&longs;um arcum EFG per &longs;olam chordam EG. <lb/></s> |
| <s>Quocirca permutando, tempus, decur&longs;us &longs;phæræ grauis B <lb/>per arcum BCD ad tempus decur&longs;us &longs;phæræ grauis E per <lb/>arcum &longs;imilem, &longs;imiliterque po&longs;itum EG erit vt tempus <lb/>decur&longs;us per chordam BD ad tempus decur&longs;us per chor­<lb/>dam EG; &longs;ed ex eadem Galilaica &longs;cientia de motu, tempus <lb/>decur&longs;us per chordam BD ad tempus decur&longs;us per æqua-<pb pagenum="58"/>iter inclinatam EG e&longs;t in &longs;ubduplicata ratione ip&longs;aru&mtail; <lb/>chordarum BD, EG; ergo tempus quoque decur&longs;us ex B <lb/>per arcum BCD ad tempus decur&longs;us ex E per arcum EFG <lb/>e&longs;t in eadem &longs;ubduplicata ratione chord&ecedil; BD ad chordam <lb/>EG, quod o&longs;tendendum propo&longs;uimus. </s></p><p type="main"> | <s>Quocirca permutando, tempus, decur&longs;us &longs;phæræ grauis B <lb/>per arcum BCD ad tempus decur&longs;us &longs;phæræ grauis E per <lb/>arcum &longs;imilem, &longs;imiliterque po&longs;itum EG erit vt tempus <lb/>decur&longs;us per chordam BD ad tempus decur&longs;us per chor­<lb/>dam EG; &longs;ed ex eadem Galilaica &longs;cientia de motu, tempus <lb/>decur&longs;us per chordam BD ad tempus decur&longs;us per æqua-<pb pagenum="58"/>iter inclinatam EG e&longs;t in &longs;ubduplicata ratione ip&longs;aru&mtail; <lb/>chordarum BD, EG; ergo tempus quoque decur&longs;us ex B <lb/>per arcum BCD ad tempus decur&longs;us ex E per arcum EFG <lb/>e&longs;t in eadem &longs;ubduplicata ratione chord&ecedil; BD ad chordam <lb/>EG, quod o&longs;tendendum propo&longs;uimus. </s></p><p type="main"> |