39. Genera and species are in order to naming. Instance, watch.

40. Species of artificial things less confused than natural.

41. Artificial things of distinct species.

42. Substances alone have proper names.

43. Difficulty to treat of words with words.

44, 45. Instance of mixed modes in kineah and niouph.

46, 47. Instance of substances in zahab.

48. Their ideas imperfect, and therefore various.

49. Therefore to fix their species a real essence is supposed.

50. Which supposition is of no use.

51. Conclusion.

CHAPTER VII.

OF PARTICLES.

SECT.

1. Particles connect parts, or whole sentences together.

2. In them consists the art of well speaking.

3, 4. They show what relation the mind gives to its own thoughts.

5. Instance in But.

6. This matter but lightly touched here.

CHAPTER VIII.

OF ABSTRACT AND CONCRETE TERMS.

SECT.

1. Abstract terms not predicable one of another, and why.
2. They show the difference of our ideas.

11. Names of substances of doubtful signification.
12. Names of substances referred, first, to real essences, that

cannot be known.
13, 14. Secondly, to co-existing qualities, which are known but

imperfectly.
15. With this imperfection they may serve for civil, but not

well for philosophical use.
16. Instance, liquor of the nerves.
17. Instance, gold.
18. The names of simple ideas the least doubtful.
19. And, next to them, simple modes.
20. The most doubtful are the names of very compounded

mixed modes and substances.
21. Why this imperfection charged upon words.
22, 23. This should teach us moderation in imposing our own sense

of old authors.

CHAPTER X.

OF THE ABUSE OF WORDS.

SECT.

1. Abuse of words.

2, 3. First words without any, or without clear ideas.

4. Occasioned by learning names, before the ideas they

belong to.

5. Secondly, a steady application of them.

6. Thirdly, affected obscurity, by wrong application.

7. Logic and dispute have much contributed to this.

8. Calling it subtilty.

9. This learning very little benefits society.

10. But destroys the instruments of knowledge and com-

munication.

11. As useful as to confound the sound of the letters.

12. This art has perplexed religion and justice.

13. And ought not to pass for learning.

14. Fourthly, taking them for things.

15. Instance in matter.

16. This makes errors lasting.

17. Fifthly, setting them for what they cannot signify.

18. V. g. putting them for the real essences of substances.

19. Hence we think every change of our idea in substances,

not to change the species.

20. The cause of this abuse, a supposition of nature's working

always regularly.

21. This abuse contains two false suppositions.

22. Sixthly, a supposition that words have a certain and evi-

dent signification.

23. The ends of language : first, to convey our ideas.

24. Secondly, to do it with quickness.

25. Thirdly, therewith to convey the knowledge of things.
26–31. How men's words fail in all these.

32. How in substances.
33. How in modes and relations.
34. Seventhly, figurative speech also an abuse of language.

CHAPTER XI.

OF THE REMEDIES OF THE FOREGOING IMPERFECTIONS AND

ABUSES.

SECT.

1. They are worth seeking.

2. Are not easy.

3. But yet necessary to philosophy.

4. Misuse of words, the cause of great errors.

5. Obstinacy.

6. And wrangling.

7. Instance, bat and bird.

8. First remedy, to use no word without an idea.

9. Secondly, to have distinct ideas annexed to them in modes.

10. And distinct and conformable in substances.

11. Thirdly, propriety.

12. Fourthly, to make known their meaning.

13. And that three ways.

14. First, in simple ideas by synonymous terms, or showing.

15. Secondly, in mixed modes by definition.

16. Morality capable of demonstration.

17. Definitions can make moral discourses clear.

18. And is the only way.

19. Thirdly, in substances, by showing and defining.

20, 21. Ideas of the leading qualities of substances are best got by

showing

22. The ideas of their powers, best by definition.

23. A reflection on the knowledge of spirits.

24. Ideas also of substances must be conformable to things.

25. Not easy to be made so.

26. Fifthly, by constancy in their signification.

27. When the variation is to be explained.

BOOK IV.

OF KNOWLEDGE AND OPINION.

CHAPTER I.

OF KNOWLEDGE IN GENERAL.

SECT.

1. Our knowledge conversant about our ideas.

2. Knowledge is the perception of the agreement or disagree-

ment of two ideas.

3. This agreement fourfold.

4. First, of identity, or diversity.

5. Secondly, relation.

6. Thirdly, of co-existence.

7. Fourthly, of real existence.

8. Knowledge actual or habitual.

9. Habitual knowledge, twofold.

CHAPTER II.

OF THE DEGREES OF OUR KNOWLEDGE.

SECT.

1. Intuitive.

2. Demonstrative.

3. Depends on proofs.

4. But not so easy.

5. Not without precedent doubt.

6. Not so clear.

7. Each step must have intuitive evidence.
8. Hence the mistake ex præcognitis et præconcessis.

9. Demonstration not limited to quantity.
10-13. Why it has been so thought.

14. Sensitive knowledge of particular existence.
15. Knowledge not always clear, where the ideas are so.

CHAPTER III.

OF THE EXTENT OF HUMAN KNOWLEDGE.

SECT.

1. First, no farther than we have ideas.

2. Secondly, no farther than we can perceive their agreement

or disagreement.

3. Thirdly, intuitive knowledge extends itself not to all the

relations of all our ideas.
4. Fourthly, not demonstrative knowledge.

5. Fifthly, sensitive knowledge narrower than either.

6. Sixthly, our knowledge, therefore, narrower than our ideas.

7. How far our knowledge reaches.

8. First, our knowledge of identity and diversity, as far as our

ideas.

9. Secondly, of co-existence, a very little way.

10. Because the connexion between most simple ideas is un-

known.

11. Especially of secondary qualities.

12–14. And farther, because all connexion between any secondary

and primary qualities is undiscoverable.

15. Of repugnancy to co-exist, larger.

16. Of the co-existence of powers, a very

little

way.

17. Of spirits, yet narrower.

18. Thirdly, of other relations, it is not easy to say how far.

Morality capable of demonstration.

19. Two things have made moral ideas thought incapable of