  Part 1 contains the general description of the sciences including their divisions as they presented themselves in Bacon's time. Here he aimed at a distinction between what was already invented and known in contrast to “things omitted which ought be there” (Bacon IV [1901], 23). This part could be taken from The Advancement of Learning (1605) and from the revised and enlarged version De Dignitate et Augmentis Scientiarum (1623).