A summary of Francis Bacon's ontology of nature followed by a pragmatic reading of his theory of 'Forms', concluding that Bacon construed the mark of a true form to be its usefulness (or, as he put it when insisting upon the necessity of usefulness to the very being of a form, 'These two directions, the one active and the other contemplative, are one and the same thing; and what in operation is most useful, that in knowledge is most true.').