41 s. METHOnrS OBSERJ^ANDl 



dcteTmin:mdii« , motum hornlog i ct ftclhie per intcgrAm rc- 

 \v)lu[ioiK-m IklLic acqiiibilcm , ct dccliii.itioncin (lcll.ic uc- 

 cur.ite dchiutam rcquirit , quorum Miiiinqiiodijuc falhix clTe 

 pi:cll. Horolo^ia cnim JQ.icqu.ilitcr iiiccdcrc (Iicpcnume- 

 ro ob(crui!itur , ct motum (kllae ob diuerllim in diucrfis 

 p.inlleli cius locis (V.uum aeris , diucrfic ae )u.di tcmpore 

 cclcntatis cfTc po^Te veritati conleutancum c(i D>termi- 

 n:\rioncm autcm. dcclinationis (\cllac accurat.un ■.ikitudincs 

 poii ct llcllic candcm inurcdjcntcs , ob rcfiactioinim quan- 

 titatcm inccrtam , ct inicqualcm diu.fioncm i^raduum ia 

 limbo quadrantis , prouti lioc faepenumcro oblt;ruatui , ct 

 locum primi diuilionis gradiuim puncfti in limbo quadran- 

 tis , ob rcthicliones honzontalcs maMmc variabilcs , ftm- 

 pcr fcrc inccrtum , inccrtac impcdirc po(funt. Diriantii 

 autcm obic^fti in Tcrrac (iipcrticic airunipti , ob impcrfe- 

 <ftioncm inllamicntorum ad ci-dcm mLUllirandas adhibcndo- 

 rum , ct importumt:ucm liKorum inrcric(fborum , fi ca>«dcm 

 per pertic:is mcnliir.irc vclis , quod ali:is tuiiihmum crt ; 

 mmquam fcre finc crrore aliquo (cnfvLiili dctcrminari 

 potell. VnJe inccrtitudo plvafuim cclipli^oi» , ct chorda- 

 rum dcfcdiu.irum pcr micromctra Kiichii ct Hirii ad idcm 

 tcmpib inucnicndiiruiu , ct diamcrrorum Luminarium ap- 

 parciuiim partibus circuli nxiximi cxpicflaruin luculcntcr 

 colli^i po cll. Conccdamus ctiam , pcr micromctra illa 

 mcthodo«>quc ol)(criiandi ab duifloribus conun tr.iditas , ph:i- 

 fc> Ljiminarium ct chordav dcfccT:iuas iisdcm tcmporis mo- 

 incnti-> ct accuratilfunas ct quamplur mas obtincri poflc , 

 fcd quid inJc cmoluincuti in Alhononiiam rtdundabit ? 

 Nilul (.Te \\\ oblcriiatinnibus cnim hi> immcdiatc dc- 

 duci polTint taiuum diamctcr dilti oblturantis , ct diilaii- 



tia 



