And though men have, of late, made use of a pendulum, as a more steady and regular motion than that of the sun, or, (to speak more truly,) of the earth;-yet if any one should be asked how he certainly knows that the two successive swings of a pendulum are equal, it would be very hard to satisfy him that they are infallibly so;
Eta gizakiek pendulua erabili duten arren eguzkiarena baino edo (zehazkiago esateko) lurrarena baino higidura konstanteago eta erregularrago bezala, hala ere, norbaiti galdetuko balitzaio nola dakien penduluaren segidako oszilazio bi berdinak direla, zail litzateke galdatzailea hori hutsezinki horrela dela sinetsita uztea, zeren ez baitugu ziur egoterik higidura horren kausak, zein den ez dakigunak, beti berdin jokatuko ote duen;