ii.) = 7<J325$93847843io 5 857 J 4 2 ^ 857 T 4^ 857 etc. 

 — 6938^9034980391, 896103, 896103, 8961 etc. 



term. VI. =693869034980391,896103,896103,8961 etc. 



unde ipfos terminos defumamus et in unam fummam colli- 

 gamus : 



term. I. = c, 30336 



II. — 2912256 



Ilf. — 33549*89 12 



IV. =z 414092848566, 857i4 ? 5 857142 



V. — 53003884616557,714285,7 



VI. = 6938690349803918,96 



Summa = 0,3036515615065147812820577003918,961038, 



961038,961038 etc. 



libi imprimis notatu dignum occurrit, quod fumma quinque 

 priorum terminorum abfolute exhiberi poteft , dum fcilicet 

 fra&io decimalis in figura 26 ma abrumpitur, haecque poftre- 

 ma formula pro 7t data ad calculum maxime videtur ac- 

 commodata. 



5. 22. Ex eodem principio , unde noftram feriem 

 deduximus, aliae fimiles feries derivari poifunt pariter ma- 

 xime convergentes. Inchoando fcilicet a ferie vulgari: 



A tang. t — t — J t 3 + * r/ — f t 7 4~ etc. 



ponamus huius feriei iam h terminos a&u ef{e colleflos , 

 quorum fumma j(it 



2=1 — 1 13 -f- i t^ 



t 2n-I 



2 n 1 



T 2 Sum- 



