C 3P7 3 
em effe in prima formul a^ vel — fumma vel diff erentia 
Radicu m Cukicarum ex V iqq—iisP^^b^ +2-7b^ q~i b'pq-f- 
+2-7 +.-7^^ -f — ib p: viz. b'-f iq fit 
qnam ^b p, /^//V^'r — ; SummA vero quoties f b b mapr eft 
qmmp', fn minor fuer it jhh J differentia. Incf^ c^cteris formti^ 
lis radix femper conflatur ex iisdem elementis^ v^natis tamen- 
[ignis + & — , ut facile percipiet qui velit experiri. 
Ope vera TabuU Logarithmic^ Sinuum Ver forum Radices 
ha fat is prompt e inveniuntur) nempe fi Coefficient es Numeri 
fmt Surdi velfra6Hyac radices Numeris ineffa!oiles\ ut plerumq; 
ft. Hac autem efl Regula : In prim ac fecunia formula ^ fi 
jhhmmor Jit^mmp ; fitjp—^b b =d, 6" pofita differ en-- 
tisL inter ^b p 2-7 b^ "f iq? eflHR^ in prima j ac inter 
jb p 4" iq & a-/ b% in faunday pro Radio ; inveniatur angu-^ 
lus cujiis Tangens efl dV d. Deinde ut Co-finus hufus anguli^ 
ad efufdem Sinum verfum : it a differentia pro Rauio habita^ ad 
quartum ; cujus hatus cuhicumtrifecando Logarithmum hahehi- 
fur : ac divifo f p — ^b b per hoc Latus Cub. e Quoto fubdu-^ 
catur Divijor : Refiduum erit quantitas Y in Fig. I. Hujns 
Refidui acjh fumma, fi centrum cadit ad dextram Axis, aliter 
differentia earundem^ Radix erit quafita, Quod / f b b ma-- 
jor fit quam p, pofito H R pro RadiOy fit d V d five diftanti-- 
aParaboloidis ab Axe^ Sinus Arcus cufufdam\ Hujus Sinus 
v^rfu^ ducatur in Radium^ five ^b p — - ^-^ b' + iq, ac trife^o 
produEti LogarithmOy hahebitur ejus Latus Cuhicum^ per quod 
dividatur ^b b — ^jp. dico Quoti ac diviforis fummam eadem 
Lege additam vel ahlatam ex |b, Radicem quafitam exhibere. 
Ac par efi ratio m tertia ac quart a fcrmulis^ nifi quod 2^b b b 
4- ibp + iq po Radio ajfumenda efi ^ ac 0 b -f- j-p //^ 
V |b b f p five dV dpro Sinu : Sed hac pracepta exemplis 
foftaffe melius per cipientur. 
Sit aquatio Cubica ZZZ--l7ZZ-{-54Z— 350, ac qua- 
ratur Radix z : Hie |b b major efi quam ^^fed q major efi 
qujim Cubus ex f b, ideoq) una tantum Affirmativa Radice ex- 
plicabilis efi. ^am — efi d, ac ^f-^ V-|- pro Sinw 
habenda efi^ ad Raditm ^ij^ 17$ "^$3, hoc efi ^J-f^ : 
E e e 2 Jrcf^s 
