The second part of the Novum Organum may be divided into three sections. The first is on the discovery of forms, i. e. causes in nature. The second section is composed of tables illustrative of the inductive method, and the third and last is styled the doctrine of instances, i. e. facts regarding the discovery of causes.
Part the third of the Instauratio Magna was to be a Natural History, as he termed it, or rather a history of natural substances, in which the art of man had been employed, which would have been a history of universal nature.
Part 4, to be called Scala intellectus, or Intellectual Ladder, was intended to be, to use his own words, “types and models which place before our eyes the entire process of the mind in the discovery of truth, selecting various and remarkable instances.”
He had designed in the fifth part to give specimens of the new philosophy; a few fragments only of this have been published. It was to be “the fragment of interest till the principal could be raised.”
The sixth and last part was “to display a perfect system of philosophy deduced and confirmed by a legitimate, sober, and exact inquiry according to the method he had laid down and invented.” “To perfect this last part,” says Bacon, “is above our powers and beyond our hopes.”
Let us return, however, for a moment to the commencement, to remark that he concludes the introduction by an eloquent prayer that his exertions may be rendered effectual to the attainment of truth and happiness. But he feels his own inability, for “his days are numbered,” to conduct mankind to the hoped for goal. It was given to him to point out the road to the promised land; but, like Moses, after having descried it from afar, it was denied him to enter the land to which he had led the way.