  Bacon's theory of matter in its final version was more corpuscular than atomist (Clericuzio 2000, 78). Bacon's particles are semina rerum:  they are endowed  with powers,  which make a variety of motions possible and allow the production of all possible forms. These spirits are constitutive for Bacon's  theory of matter. As material, fine substances, composed of particles, combined from air and fire, they can, as we have seen, be either inanimate or animate. Bacon thus suggests a corpuscular and chemical chain of being: