Thirdly, by sensation observing certain appearances, at certain regular and seeming equidistant periods, we get the ideas of certain LENGTHS or MEASURES OF DURATION, as minutes, hours, days, years, &c.
Hirugarrenik, sentipenaren bidez zenbait agerpen zenbait aldi erregularretan gertatzen direla erreparatuz, iraupenaren luzera edo neurri batzuk erdiesten ditugu, hala nola, minutuak, orduak, egunak, urteak, etab.