== (13 + ) 



Haec acquario per fin. (3 — i diiiifa ckt: fln." (3 -h w fin. ^ — 

 m — o. Vndc aequatio cubica radices habct : fiii. p — i , 

 cf fin. ^ — =i^L±Jll!^i!!Ltlli , fiquidcm finus ncgatiui hinc cx- 



cluduntur. Cafu priore §> ct ;• cuanefcunt, dum in ipfo polo 

 lincac 1) M ct OM coinciduntj undc fccunda tantum radix 

 hiic pcrtinct. Eft nempc J >/ ( w/ w -4- 4. w) m i, i 209616 et 

 J ;// rz o, 5021834-, ergo calii Maximi fin. p ~ -+- o, 61 8778^ 

 ct p — 38". I 3'. 37''''. Notari liic mcrctur, arguhim (^Ml), 

 feu diffcrentiam intcr hititndincs in liipcrficic ct c ccntro tcl- 

 luris obfcruatas , ficri Maximum , quando p _-. 45°, qui valor 

 ab co, qucm hic inucnimus, longc diflfcrt ob rarioncm inm (n- 

 pra allcgatam , quod ncmpc ditfcrcntia ^ — f diiphci nirirur 

 fundamcnto , angulo C M 1) ac difFcrcnria axium. Ccrcrum 

 jnaximus iUius ^nlor crit: 



-atang.ri(i '- r-^-atanc^.^^^i^i^sY^^C^ —.. — ,) 



-O, OOI3I.<7. 



Quodfi crgo integrum hcmirphacriiim fucrit proic(f}um, 

 a crit ipfc radius proiccftionis, qui cum nunquam unum pcdcm 

 c\ccdcrc folcat, maxima crit corrcdio i^o, iss6 lin. duodc- 

 cim. fcu minor quam [ lineae; quae itaquc, cum pro cunLiis 

 cctcris Parallclis minor fit , mcriio nc^Iigi potcll , ut iraque 

 proicc^tio hcmirphacrii ficrcographica polaris fecundum hypothc- 

 fin fphaericam finc ullo crrore fcnfibili poff-t abfi)lvl. Iir.mo fi 

 vel maximc parvum fcgmentum polarc proiiccrcrur arquc ra- 

 dius a mulro maior fumcrcrur, tamcn circa poluin hacc diffc- 

 rcntia prorlus cuancfccrct, undc hic nulla opus crit corrc6io- 

 nc. Quarc his non diutiub inmioror. 



Tro- 



