For, supposing the sensation or idea we name whiteness be produced in us by a certain number of globules, which, having a verticity about their own centres, strike upon the retina of the eye, with a certain degree of rotation, as well as progressive swiftness; it will hence easily follow, that the more the superficial parts of any body are so ordered as to reflect the greater number of globules of light, and to give them the proper rotation, which is fit to produce this sensation of white in us, the more white will that body appear, that from an equal space sends to the retina the greater number of such corpuscles, with that peculiar sort of motion. I do not say that the nature of light consists in very small round globules;
Zeren, suposaturik zuritasuna deritzan sentipena edo ideia gure baitan beren zentroaren inguruan jirabiraka dabilen globulu kopuru zehatz batek eragiten duela, errotazio gradu jakin batez euren zentroaren inguruan biraka ibiliz eta abiadura hazkorrez begiaren erretina joz, hori suposaturik, diot, hemendik erraz aterako litzateke honako hau, alegia, zenbat eta hobeto eraturik eduki gorputz batek azaleko zatiak argi-globulurik gehien islatzeko eta gure baitan zuritasun sentipen hori eragiteko behar den errotazio egokia emateko, orduan eta zuriago agertuko dela gorputz hori, gure erretinara lekune berdinetik korpuskulu gehiago bidaltzen dituenean higidura mota berezi horrekin.