Mechanics, physics, and chemistry teach the rules and laws according to which the forces of impenetrability, gravitation, rigidity, fluidity, cohesion, elasticity, heat, light, affinity, magnetism, electricity, &c., operate; that is to say, the law, the rule which these forces observe whenever they enter time and space.
-Mekanikak, fisikak, kimikak arauak eta legeak irakasten dituzte, zeinen arabera barrenezintasuna, pisutasuna, solidotasuna, jariakortasuna, kohesioa, elastizitatea, beroa, argia, kidetasuna, magnetismoa, elektrizitatea eta abarrek eragiten baitute, h. d. legea, araua, zeinak indar horiek aldioro denboran eta espazioan agertzearen ikuspegitik betetzen baituzte: