$. 12. Alter aiitem valor pro fin. (J) inucntiis dat 

 /In. (J) " — 1,618034., qui ciim lit vnitatc maior, mon- 

 ftra: hunc angulum effe imaginarium, ad qucm defiuicn- 



f— ♦ -4- f-+- ♦ 

 dum notctur eflTc cof. V — i = , qui valor 



cum manifcflo maior fit vnitate, et quidcm pofitiuus vta- 

 mur hac formula: 



COf (TT + gV-l)= -^-f~\ 



Quodfi ergo faciamus 



(p — 90°-it-&V-z—$V-i^'[, erit 



fin.(p = -f i_, 



2 



qnamobrem dcbct effe « 



e-*-he* , ^ ^ ^ X -4- V 5 



n_z=:-^ 1,618034=: i 



2 2 



pro qiio numcro brcuiratis gratia feribamus f , Vt fit 

 e^-^e—^—^i^ vndc colligitur 



f*=:E4-V(££-i)~'- ^-^ + y '-^^' -e-\-Vey 



ct fubAituto valore fit f* — 2, 0581710. Hinc igitur fiet 

 ^ = /.2,0581710, fumendo fcilicct logarithiiuim hypcrbo- 

 licum, qiii rcpcritur fi logariihmus vult^aris muJtipiiccrnr 

 pcr 2,3025851. Cum igitur Jogarithmus vulgaris fit 

 c, 31348x6 crit 



= 0, 3134S16. 2, 3C25S51 = o, 72J8I77* 



§. 13. Invcntis igifur his v^loribus pro ^ ct 9, 

 ex priore CP — ^ omnes anguli cp, quibus noflcr dcnomi- 



nator 



