Full text: Volumen primum. Opera mechanica (1)

DE CENTRO OSCILL. CONTROVERSIA. ſervavi, quum in lucem ederem leges ejusmodi motuum in
diariò Pariſienſi 1669 menſis Februarii, ita ut minime pro lege
naturæ habendum ſit, eandem motus quantitatem ſemper con-
ſervari, niſi alicui impendatur & conſumatur, ſed hæc con-
ſtans lex eſt, corpora ſervare vim ſuam adſcendentem, & idcir-
co ſummam quadratorum velocitatum illorum ſemper manere
eandem; Hoc autem non ſolum obtinet in ponderibus pen-
dulorum, & percuſſione corporum durorum, ut ibidem ob-
ſervavi, ſed in multis quoque aliis mechanicis experimentis.

Demonſtraveram admittendo principium Abbatis Catelani,
vim aſcendentem ponderum penduli augeri, & ita commune
eorum gravitatis centrum altius poſſe reverti quam unde de-
ſcenderat, unde inferebam, hoc poſito inventum fore perpetu-
um mobile. D us . Bernoulli non concedit hanc conſequentiam
ob aëris obſtaculum, & quædam alia, quæ effectum impedi-
rent: ſed conſiderare debuiſſet, cum altitudo illa major,
quam acquirit centrum gravitatis, ſemper determinata ſit quan-
titas, & effectus obſtaculorum non ſit determinatus, imo mi-
nui magis magisque poſſit, facile conſtrui poſſe machinam,
in qua commodum ex elevatione centri gravitatis deriva-
tum, præponderaret impedimento obſtaculorum; ſed revera [?]
i [?] d experiri neceſſe erit nunquam.

182. FINIS.

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