And, perhaps, our progress in natural philosophy is chiefly retarded by the want of proper experiments and phaenomena, which are often discovered by chance, and cannot always be found, when requisite, even by the most diligent and prudent enquiry.
Eta agian gure aurrerapena filosofia naturalean zerak batez ere atzeratzen du, behar den esperimentu eta fenomenorik ezak, sarritan adurrez aurkitzen diren eta behar denean ikerkuntzarik zorrotzenez eta zuhurrenez ere topatu ezin diren fenomenoak hain zuzen.