.
IshouldaddnothingfarthertothistheFourthPartofthePrinciplesofPhilosophy, didIpurposecarryingoutmyoriginaldesignofwritingaFifthandSixthPart, theonetreatingofthingspossessedoflife, thatis, animalsandplants, , anddonotknowwhetherIshalleverhavesufficientleisuretofinishthem, Iwillheresubjoinafewthingsregardingtheobjectsofoursenses, thatImaynot, forthesakeofthelatter, delaytoolongthepublicationoftheformerparts, orofwhatmaybedesideratedinthem, whichImighthavereservedforexplanationinthoseothers: forIhavehithertodescribedthisearth, andgenerallythewholevisibleworld, asifitweremerelyamachineinwhichtherewasnothingatalltoconsiderexceptthefiguresandmotionsofitsparts, whereasoursensespresenttousmanyotherthings, forexamplecolours, smells, sounds, andthelike, ofwhich, ifIdidnotspeakatall, itwouldbethoughtIhadomittedtheexplicationofthemajorityoftheobjectsthatareinnature.
(SENSUS) is, andhowweperceive.
