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# Title: Lectures De Potentia Restitutiva, Or Of Spring (shelfmarks Leibn. Marg. 105, Stück 1; Leibn. Marg. 105)
# Folio 5, page id 859264114:0011
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From ehis Principle it will be casie to calculate
che sereral Arensth OF BOWS, aSOF LOnS BOIS OK
Cross- BOWS, Whether chey bemade oF Nood, Sccel,
FIorns, Sincs, or the likc. Asallo oF che Balistae OF
Catapultae uled by the Ancients, Wrhich beinq once
Found, and Tables thereot calculaced, I Mall anon
te a rar hoir to calculate the porrer cher hare
in Mootins or castins oF ArrOWS, BUIICES, StOnCS,
Oranadoes, or thelike.
From chele Principles also it ill be casie to calculate
the proportionate strengch oF the sprins ot a WV atch
uxon chetulerthereot, and consequently ot adjust.
ins theFules co chesprins (0 a8 to make it draw or
morethe Wacch alrarswith an equal force.
From chelame al(o it ill Bc casie to gire therea-
Con of chc Isochrone mation ot a Sprins or extended
Strino, and ot che unitorm Cound produced br chose
irhose Vibrations are quiek enoush to produce an
qudible Cound, a5 likemise the realon OF the Pounds
and elicir rariations in aI manner OF POnOCOUS OE
springins Bodies, OF trhich more on another occation.
From this appears the realon, a5 I MaII Mer by
and by, rhy a Sprins applied to the balance oF a
Watch dothmake the Vibrations chereot equal, whe-
chercher begreater or smaller, onc oF wrhieh kind I
Mered tothe riohe HTonourable the Lord Viseoune
Bronnker, the Honourable Robert Boyle F (9; and Sir
Robert Morey inthe rear 2660. in order to hare gOt-
ten Lecters Patents for theule and benetit thereof.
From chis ic Will be casie to makce a PhiloCophical
Scale to examine che eighe ol any bodr withour
puctins in eists, Wrhich was chat irhich lmenti-
oned at cheend of my description of Hleliolcopes, the
oround ot irtrich ras veiled under this ANaBraM,
cediinnoopsssttnn namels; Ut pondus sicten-
sio. TheFabrick oF wrhich sec in the chree Arst fgurCS.
This Scale Icontrired in order to examine theora
vitation oE bodies tomards the Center oF the Parct,
22X. FCd