They are not identical with natural law, but with definitions of simple natures (elements) or ultimate ingredients of things from which the basic material structure has been built (Gaukroger 2001, 140). Forms are the structures constituted by the elements in nature (microphysics). This evokes a cross-reference to Bacon's atomism, which has been called the “constructivist component” (Pérez-Ramos 1988, 116) of his system, including an alchemical theory about basic kinds of matter. He aims at “understanding the basic structures of things … as a means to transforming nature for human purposes” (Gaukroger 2001, 140; Clericuzio 2000, 78ff.); and thus he “ends” the unfinished Novum Organum with a list of things which still have to be achieved or with a catalogue of phenomena which are important and indispensable for a future natural history.