IfthisDiscourseappeartoolongtobereadatonce, itmaybedividedintosixParts: and, inthefirst, willbefoundvariousconsiderationstouchingtheSciences; inthesecond, theprincipalrulesoftheMethodwhichtheAuthorhasdiscovered, inthethird, certainoftherulesofMoralswhichhehasdeducedfromthisMethod; inthefourth, thereasoningsbywhichheestablishestheexistenceofGodandoftheHumanSoul, whicharethefoundationsofhisMetaphysic; inthefifth, theorderofthePhysicalquestionswhichhehasinvestigated, and, inparticular, theexplicationofthemotionoftheheartandofsomeotherdifficultiespertainingtoMedicine, asalsothedifferencebetweenthesoulofmanandthatofthebrutes; and, inthelast, whattheAuthorbelievestoberequiredinordertogreateradvancementintheinvestigationofNaturethanhasyetbeenmade, withthereasonsthathaveinducedhimtowrite.
