i occurrit motumque fuum fervatjUnamfuaedetcrminacionis partcm ex lege immuta pofitaunabilitatis Natura (emper fervatintegram,& fecundumillam movetur altera muta p™ ££ta* Ratio hujus eft, quia corpus obvium tantum uni hujus determinarionis tatur,mu-parti adverfatur, nempe defcenforix, cum huic… … Sic ex.gr. mobilc C duas habct determinatlones inobliquo defccnfu fecun- dum lineam CB, unam nempe lateralem, quae motu fuo fempcr in latitudincm verfus G D,fcu dextram verfus tcndit,&ha:c non eftcontraria ipfi obviocorpori EBF,utpatet. Alteraautem determinatio qua? eft defcenforia qua mobile…
Optics, Geometrical · Optical instruments
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