ij-Si METHODVS OBSERrANDI 



mento obferii.uionis , vt prius , nfluTnpto , pofitio ccntri 

 L111V.IC ;kl llcllam vcl ciib lociis rcrpciftii ■.icqu.itoris 1110- 

 nicnto oblcru;uionis obtincns ad nioduni pnKccdciuinm 

 (blntionum ficilc dctcrminari poterit. Sc : llt circulus 

 Fig. 8. ACEG cum lincis paniilclis ct transncrfb campus tubi 

 cum fidcmatc capillorum §S'"^ dclcripto, in (juo circulus 

 minor N^L ell Lnna, cuius ccntri L pofuio ad capillnm GC 

 fcn iincac L e ct n e olcillationibub horologii ad motum 

 Ikllac rclatis cxprcfTic momcnto oblcruationis obtincntcs 

 ad modum in §11'"° dcfcriptum cx iisdcm datis inucni- 

 endac daiuiir , linca S (9 dunnus lcn parallclus Ikllae S, 

 in qno cadcm inccdcndo ad capillum parallclorum pri- 

 mum AE in <? , ad obliquum HD in r .. ct ad BD 

 in <7 appcllit. Duda a pundo <7 , linca a b g ., parallc- 

 Li ad GC lincac obliquac HD in b occurrcntc , dcmilTo- 

 qnc in cam a puncio ;• pcrpcndiculo r d ^ tormabuntur 

 iudc duo triangula rcdangula ct limilia aoq^ i:i a r d 

 pcr conllru<ftioncm ; in quibus pcr oblcruationcs liipcrio- 

 rcs dantur lincac a ^ r , ct a q ., olcillationibns horo- 

 logii ad motum Itcllac rclatis cxprcnac , vndc linca qii(v 

 qne a d ., in iistlcm parnbus , ct angnli dar ct ard 

 cum iisquc pcrpcndicnlaris rd—db^ (ob angulos drb^ 

 et dbr lcmircdos pcr conllruL^t : ct acqnalcs) inncnicn- 

 tur. Summa lincanim nK)do inucntarum a d cx. dr lcu 

 d b ., dabit lincam ab^ cuius diffcrcutia a bnca nc pcr 

 obf^ruationcm i '''"" data , lincnii <7 ;/ , vt pnns manife- 

 flabit. Porro in triangnlo rcclmgulo atp^ w linca L. e 

 ad diurnum vh]Uc llcllac proiludi.i liiicam(]uc <7^i^ in / ad 

 angulo^ rciftos iL-cantc fiirmato, hitcrc ciu^ at ~ ne^ ct a ii;iil(> 

 tap—dar datis , lucra tp ct <7p inucnicntur. Addatur latti-./ /) , 



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