d legnan obliquia umplogi inrealterl esmotuii da incedn ed per ꝛn Xtremami tentia lain quælttn
ipſum h
criptianu s apparan ectio nôa poſt ixa dro tanton rræceſiio: tiorü,qer rit 8 0.In us polss edentu tu cipituria noctilb nſienspul æqpuin-
quinocdimn do adiecen efficiat o
lolſticoi r. Quo tm regillequ s uero odè- dium dumn a repetii itur in me nenſus co- doct
mat᷑ utcũq; x ſignũ,& in ipſo
culus deſcribatur HD, qui
RBEVvoLvrro Nv L.IB. FII. 65
cludit tandem quã diximus intortã lineam xkxILSMTMN. Itaq; manifeſtum eſt, quòd in una reuerſione obliquitatis bis præce
dentium bisq; ſequentium limitem terræ polus attingit.
Quomodo motus reciprocus ſiue librationis ex circularibus conſtet. Cap. I111.
Vodigitur iſte motus apparentijs conſentiat am⸗ Nmodo declarabimus. Interim uero quæret aliquis, quo nam modo poſsit illarum librationum æquali⸗ as intelligi, cum à principio dictum ſit, motum cęle ſtem æqualẽ eſſe, uel ex æqualibus ac circularibus cõpoſitum.
in uno apparẽt ſub utriſq; ter minis, ꝗbus neceſſe eſt ceſſa⸗ tionẽ interuenire. Fatebimur quidem geminatos eſſe, at ex ęqualibus hoc modo demon ſtrant᷑. Sit recta linea àA², quę quadrifariã ſecetur in onꝝ ſi gnis,& in ↄ deſcribãtur circu Ii homocentri, ac in eodẽ pla no ADB,& Cpꝝz,& in circũfe⸗ rentia interioris circuli aſſu⸗
cẽtro, interuallo uero ꝶ ꝑ cir B
ſecet ⁊ ² rectã lineã in u ſigno,& agat᷑ dimetiẽs dr c. Oſtẽdendũ eſt, ꝙ geminis motibus circulorũ p& ꝝ cõcurrẽtibus in⸗ uicẽ n mobile ꝑ eandẽ rectam lineã a s hinc inde reciprocãdo re pat. Quod erit, ſi intelligat᷑ nmoueri in diuerſam partẽ,& duplo magis ipſo v. Quoniã idẽ angulus, ꝗ ſub opr in cẽtro circuli orꝝ
& circũferẽtia ipſius o np cõſiſtẽs cõpræhẽdit utrãq; circũferen
tiã circulorũ ęqᷓliũ a n duplã ipſi x o, poſito ꝙ aliquãdo in cõiun ctiõe rectarũ lineari ao& mobile u fuerit in s cõgruente cũ a,&x in c. Nũc aũt in dextras ꝑtes ꝑrc motũ eſt centrũ r,&
ipſum uꝑ ou circumferentiã in ſiniſtras duplo maiores ipſi or-
r iij uel
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