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Invenire vim qua corpusculum, extra centrum Sphaerae in axe segmen∣ti cujusvis locatum, attrahitur ab eodem segmento.
A segmento EBK trahatur corpus P (Vide Fig. Prop. 79.80.81.) in ejus axe ADB locatum. Centro P intervallo PE
describatur superficies Sphaerica EFK, qua distinguatur segmen∣tum in partes duas EBKF & EFKD. Quaeratur vis partis prioris per Prop. LXXXI. & vis partis posterioris per Prop. LXXXIII.; & summa virium erit vis segmenti totius EBKD.Q.E.I.
Explicatis attractionibus corporum Sphaericorum, jam perge∣re liceret ad leges attractionum aliorum quorundam ex particu∣lis attractivis similiter constantium corporum; sed ista particula∣tim tractare minus ad institutum spectat. Suffecerit Propositio∣nes quasdam generaliores de viribus hujusmodi corporum, de{que} motibus inde oriundis, ob eorum in rebus Philosophicis aliqua∣lem usum, subjungere.