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# Title: Lectures De Potentia Restitutiva, Or Of Spring (shelfmarks Leibn. Marg. 105, Stück 1; Leibn. Marg. 105)
# Folio 23, page id 859264114:0029
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OE the accelerated descendins motion, p bis thenthe
Velocier rich rhich the body isttrot, and pis the
Doint ot rest irhere che porrer. Ot Graviey begins to
rork onthe body and make it descend. Noi dra-
ing Lines parallel to agr, 255tu, st sires che Velo-
ciey ot che point r’alcendins, and tn the Velocier oF
chelame point t descending.
Again, p b st signities chespace ascended, and pFn
the Space descended, (0 that subtractine the descent
tromtheascent rou havetheheioht abore thelincb d,
theconsideration of this, and the equal proorels FOr-
ards rill sire che incermediace Velocicies, and de-
termine the points of the Parabola.
No havins che factus siven by this Scheme ox
Scale, appropriatedto theparticular Velocitr, irhere-
with auy body is mored in this orthac line oF Incsi-
nation, ic mill be calie to fnd miat Velocity in anv
Inclination mill chro it to any length; Por in any
Inclination as the (quare oE the Velocier thusfound in
this Scale for any inclination is to the square oF any
Ocher Velocier, (0 is the distance found by chis
Seale to the distance anlverins tothe second Velo-
city.
Phare not nom time to inlarge upon this speculati-
on, irhich rould aftord matter enough to AII a V0.
lume, by irhich all the difticulties aboue impresed
and receired motions, and the Velociries and effects
relultins ould be casilr resolved.
Norhareinom cime co mention the great number
OF ules that are and may be made ot Springs in MC-
chanick contrivances, but Mail only add, FhaEOF aII
Springy bodiesthereis none comparable torhe Rir For
ehe valtness oF its porver ot extention and contracti.
On. Epon this Principle I remember to have scen
lons sinee in Wadham Colledse, in the Carden oFthe
lcarned Dr. Wilhins, late Bistop OF Chester, a P’oun-
tain (o contrived as by the Sprins ot the included
Aix tochrom up t0a greac heishe a larse and lactine
Preard