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# Title: Leibniz-Handschriften zur Mathematik LH 35, 9, 15
# Folio 2v, page id 00068139:0004
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Nempe sit A splatim chorda RB
quae puncto R immobili manente altero 
protensa est usque in A.  spatium praeterna
turale tensionis erit AB. Jam chorda
dimissa se denuo restituat. I. Ett ede
Tunc plena quidem restitutio facta erit
quando punctum mobile ob redibit ad locum
e plena s
tuum naturalem B. Eaque restitutio intelligatur
fieri in tempore APQ  quad repraesentetur
per APN arcum quadrantis B A PN cujus radius
AB vel BN. Ao si medio tempore
seu durante adhuc restitutione in spatio praeter
uniturali AB. punctum assumatur ut 9. atque:
inde educatur ad quad eantem ad circumferentiam
mobile
sinus gP Tunc tempus quo chordae extemum ex
A  se restituit usque in Q. fore ad tempus
restitutionis plenas usque in BB ut arcus
AP est ad arcum quadrantis iintegrum
s
N, seu spatio restitutione afsoluta
sive si spatia restitutione absoluta AG. AB
sint ut sagi sinus versi, tempore restitu
tionum erunt ut anguli ABI. AB
si tempora restitutionum sint ut anguli spatia
praeternaturalia restantia, seu tensiones
residuae erunt ut sinus complementi
Atque ita arcanum hanc progressionem
sane investigatu difficillimam e latebris
ernimus. Difficillimam dico, quia quae–
renda est Methodo Tangentium inversa
quae non est in potestate.
Nen
facile puto Geometricum problema
proponi posse quod sit isto difficilius
si communes methodos spectemus.