JB_101_396.xml

Title: [27 Aug. 1814 Logic Ch. │ │]

Description: 27 Aug. 1814

Logic

Ch. │ │ Invention

'.5 Helps to all

11

2

Of the utility derivable from the search after analogies, whether on the same scale or on different scales - and thence whether on different levels or on the same level, three Latin words, viz. Quodlibet cum quolibet, may form another memento.

It is in the instance of the physical department of the field of thought and action, and more particularly to the chemical district of that department, that the applicability of this memento is most conspicuous. Upon every subject try, or at least think of trying every operation: to every subject in the character of a menstruum, apply every subject in the character of a solvent:- and so on.

It is to the extent into which application has been made of this memento that chemical science is indebted for the prodigious strides which within the compass of the present generation has[?] been made in it.

353

JB_101_388.xml

Title: [26 Aug. 1814 '.2 + Logic Ch]

Description: 26 Aug. 1814 '.2 +

Logic

Ch. │ │ Invention

'.2 Helps to all

4

1

'.2. Helps applicable to arts in general without exception or distinction.

In this view, a few rules present themselves as capable of being found, to some minds in the way of original instruction, to any minds in the way of memento or reminiscence, not altogether without their use. In some sort by affording positive helps: in others by the indication of obstacles: of certain obstacles, {the force of which will be to be encountered} which, in any track of the field of invention, the labourer will find standing in his way, and opposing his progress: and obstacles of the existence and force of which it concerns him to be well apprised, lest, when the time comes they find him unprepared.

Memento 1. Whatever be the art, which or in which, you think to invent, keep steadily in view the particular end at which it aims: the effect the production of which it has for its object. Keep your eyes fixt upon the end. In two latin words, Respice finem. Finem suspicito.

Memento 2. Beware of intellectual servility. In other words, take Reason not Custom for your Guide: the Reason of the thing including the nature of the effect meant to be produced, not confining yourself to the pursuing of the practice, to the performance of those operations and those only by which alone the effect is as yet wont to be produced. Dux sit non Mos sed Ratio. Non mos sed Ratio dux est.

Memento 3. Be on your guard against the confederated adversaries of all good, and thereby of all new good: viz. 1. Indigenous Intellectual Weakness. 2. Sinister Interest. 3. Interest-begotten prejudice. 4. Adoptive prejudice. +

Memento 4. In relation to every part of your subject, and every object connected with it, render your ideas as clear as possible. Lux undique fiat.

Memento 5. For means and instruments look out for analogies. Analogias

undique

indagato.

Memento 6. In your look-out for analogies, for surveying that quarter of the field of thought and action to which the art in question belongs, employ the logical ladders, the ladders made of nest of aggregates placed in logical subalternation. Analogias indagare. In Analogiarum indagatione scalis logicis utere.

Memento 7. Inquire & learn whatsoever, for the production of the effect in question has been already in use or in prospect. Iam acta et tentata discite.

+  Where they can not by force these events oppose, by discouragement, by discouraging opinion and advice.

345

JB_101_147.xml

Title: [27 July 1814 '.3. + Logic Ch]

Description: 27 July 1814 '.3. +

Logic

Ch.4.IV.V.VI.VII. Functions &c.

'.4.VIII. Uses

9

1

'.3.VIII Uses of Logic or, Uses to which Logic is applicable.

VI. Uses of Logic: uses capable of being made of this branch of art and science: art: uses to which it is capable of being put.

In this case as on[?] any other - in the instance of this art as in regard to every other, an use is either a modification of the universal end, i.e. well-being: or a subordinate and subservient end, i.e. a means, capable of being employed towards the attainment of that same universal end.

Be the thing, be the object what it may, if it neither performs nor contributes to the performance of service in either of these shapes, it is of no use - use, real use, it has none.

 Refer here to tit. Ethics, or take from thence some of the most general matter and insert it here.

If it has any use belonging to it that can with propriety and intelligibility be termed use, it must be either by a direct way to encrease the aggregate mass of pleasure or applying defalcation to the aggregate mass of pain: or else by contributing or tending to contribute in some way or other less immediate to the production of one or other or both of those ever desirable and ultimately only desirable effects.

Of the field of exercise of this art a sketch has been already given above: the aggregate of its uses is coextensive with that field.