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# Title: Phoronomia, Sive De Viribus Et Motibus Corporum Solidorum Et Fluidorum Libri Duo (shelfmark Leibn. Marg. 182)
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P R A F A Y T O
aquitur theoria nora ceneri oscillationis, quae propter simplici
catem luam non displicebit, ue opinor: ea toca fundatur in co,
quod solicirationes quaedam altumtae ec in particulas oscillan-
ces agentes in directionibus perpendicularibus distantiis parti-
cularum ab axe oscillarionis aequipollent graritatis pressionibus;
ope hujus principii ee compararionis penduli compolici cum
simplice ei ilochrono, illico reperitur longitudo hujus penduli
Simplicis, idque per unicam atque simplicem analogiam. Cum
primum in hanc cheoriam incidi, quod minimum ante trien-
nium ex quod excurrit, accidit, eam tantum praritati unifor-
mi, ut Tlugenius ec Jac. Bernoullius, applicueram, sed postea,
ex quo in ACta Lip(enCIa 17FZ. VI. FebT. incidi, abi Celcb.
Joh. Bernoullius in 5. 23. Cgregii sui Schediasmaris de nora
centri oscillationis theoria, quae tam ad pendula inera rarios
liquores oscillantia, quam extra eosdem, sele extendat, en-
tionem facie, in hisce etiam circumstantiis methodimea pe-
riculum facere caepi optimo cum succestu, ram sponte lua ea, quae
Bernoullius de lua tunc pollicebatur, ec postmodum anno sequen-
eiMen(. Jan. Pexesticie, ulero sese mihi obtulerunt satim post le-
ctum specimen prius anni 1723. praeterquam quod demonstra-
tione facili id demonstratum dedi, quod Hugenius tanquam
vostulatum sibi concedi postulabat, centrum scilicet commu-
ne oraritaris omnium particularum, cujusque penduli compoli-
ei diffractis, quibus connexa erant, rinculis ad eandem alcitu-
dinem attolli posse moru earum in altum converso, ex qua idem
centrum ceciderar, particulis tamen inter se conneris. FXne-
morabili ejusmodi naturx lere methodo, ni fallor, nora regulas
motus ex percussione corporum elacticorum derirari.
Liber Secundus corporibus Auidis destinatus perplura com-
plectitur. Asit enim de graritacionibus liquorum quorumlibet
cum in plana subjecta, tum in latera ralorum, indeque cano-
nes derirantur circa vires ralorum, uc citra tracturam liquo-
2