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I place this fragment here in deference to Mr. Ellis’s decided opinion that it was written before the ADVANCEMENT OF LEARNING. The positive ground indeed which he alleges in support of that conclusion I am obliged to set aside, as founded, I think, upon a misapprehension; and the supposition that no part of it was written later involves a difficulty which I cannot yet get over to my own satisfaction. But that the body of it was written earlier I see no reason to doubt; and if so, this is its proper place.

The particular point on which I venture to disagree with Mr. Ellis I have stated in a note upon his preface to the NOVUM ORGANUM, promising at the same time a fuller explanation of the grounds of my own conclusion, which I will now give.

The question is, whether the “Inventory” in the 10th chapter of VALERIUS TERMINUS was to have exhibited a general survey of the state of knowledge corresponding with that which fills the second book of the ADVANCEMENT OF LEARNING. I think not.

It is true indeed that the title of that 10th chapter,–namely, “The Inventory, or an enumeration and view of inventions already discovered and in use, with a note of the wants and the nature of the supplies”,–has at first sight a considerable resemblance to the description of the contents of the second book of the ADVANCEMENT OF LEARNING,–namely, “A general and faithful perambulation of learning, with an inquiry what parts thereof lie fresh and waste, and not improved and converted by the industry of Man;… wherein nevertheless my purpose is at this time to note only omissions and deficiencies, and not to make any redargutions of errors,” and so on. But an “enumeration of INVENTIONS” is not the same thing as “a perambulation of LEARNING;” and it will be found upon closer examination that the “Inventory” spoken of in VALERIUS TERMINUS does really correspond to one, and one only, of the fiftyone Desiderata set down at the end of the DE AUGMENTIS; viz. that INVENTARIUM OPUM HUMANARUM, which was to be an appendix to the MAGIA NATURALIS. See DE AUG. iii. 5. This will appear clearly by comparing the descriptions of the two.

In the ADVANCEMENT OF LEARNING Bacon tells us that there are two points of much purpose pertaining to the department of Natural Magic: the first of which is, “That there be made a calendar resembling an Inventory of the ESTATE OF MAN, containing ALL THE INVENTIONS, BEING THE WORKS OR FRUITS OF NATURE OR ART, which are now extant AND OF WHICH MAN IS ALREADY POSSESSED; out of which doth naturally result a note what things are yet held impossible or not invented; which calendar will be the more artificial and serviceable if to every reputed impossibility you add what thing is extant which cometh the nearest in degree to that impossibility: to the end that by these optatives and essentials man’s inquiry may be the more awake in deducing direction of works from the speculation of causes.”

The Inventory which was to have been inserted in the 10th chapter of VALERIUS TERMINUS is thus introduced:–“The plainest method and most directly pertinent to this intention will be to make distribution of SCIENCES, ARTS, INVENTIONS, WORKS, and their portions, ACCORDING TO THE USE AND TRIBUTE WHICH THEY YIELD AND RENDER TO THE CONDITION OF MAN’S LIFE; and under those several uses, being as several offices of provisions, to charge and tax what may be reasonably exacted or demanded,… and then upon those charges and taxations to distinguish and present as it were in several columns what is extant and already found, and what is DEFECTIVE AND FURTHER TO BE PROVIDED. Of which provisions because in many of them, after the manner of slothful and faulty accomptants, it will be returned by way of excuse that no such are to be had, it will be fit to give some light OF THE NATURE OF THE SUPPLIES; whereby it will evidently appear that they are to be compassed and procured.” And that the calendar was to deal, not with knowledge in general, but only with arts and sciences of invention in its more restricted sense–the PARS OPERATIVA DE NATURA (DE AUG. iii. 5.)–appears no less clearly from the opening of the 11th chapter, which was designed immediately to follow the “Inventory.” “It appeareth then what is now in proposition, not by general circumlocution but by particular note. No former philosophy,” etc. etc. “but the revealing and discovering of NEW INVENTIONS AND OPERATIONS,… the nature and kinds of which inventions HAVE BEEN DESCRIBED as they could be discovered,” etc. If further evidence were required of the exact resemblance between the Inventory of VALERIUS TERMINUS and the Inventarium of the ADVANCEMENT and the DE AUGMENTIS, I might quote the end of the 9th chapter, where the particular expressions correspond, if possible, more closely still. But I presume that the passages which I have given are enough; and that the opinion which I have elsewhere expressed as to the origin of the ADVANCEMENT OF LEARNING,–namely, that the writing of it was a by-thought and no part of the work on the Interpretation of Nature as originally designed,–will not be considered inconsistent with the evidence afforded by these fragments.