DDRESSED TO TEACHERS= 165

=NOTES TO APPENDIX= 195

=INDEX.=

Sec. 1. Tables 197

Sec. 2. Words &c. explained "
pg-xxxii
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BOOK I.

THINGS AND THEIR ATTRIBUTES.

CHAPTER I.

_INTRODUCTORY._

The Universe contains '=Things=.'

[For example, "I," "London," "roses," "redness," "old English
books," "the letter which I received yesterday."]

Things have '=Attributes=.'

[For example, "large," "red," "old," "which I received
yesterday."]

One Thing may have many Attributes; and one Attribute may belong to many
Things.

[Thus, the Thing "a rose" may have the Attributes "red,"
"scented," "full-blown," &c.; and the Attribute "red" may belong
to the Things "a rose," "a brick," "a ribbon," &c.]

Any Attribute, or any Set of Attributes, may be called an '=Adjunct=.'

[This word is introduced in order to avoid the constant
repetition of the phrase "Attribute or Set of Attributes."

Thus, we may say that a rose has the Attribute "red" (or the
Adjunct "red," whichever we prefer); or we may say that it has
the Adjunct "red, scented and full-blown."]

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CHAPTER II.

_CLASSIFICATION._

'Classification,' or the formation of Classes, is a Mental Process, in
which we imagine that we have put together, in a group, certain Things.
Such a group is called a '=Class=.'

This Process may be performed in three different ways, as follows:--

(1) We may imagine that we have put together all Things. The Class so
formed (i.e. the Class "Things") contains the whole Universe.

(2) We may think of the Class "Things," and may imagine that we have
picked out from it all the Things which possess a certain Adjunct _not_
possessed by the whole Class. This Adjunct is said to be '=peculiar=' to
the Class so formed. In this case, the Class "Things" is called a
'=Genus=' with regard to the Class so formed: the Class, so formed, is
called a '=Species=' of the Class "Things": and its peculiar Adjunct is
called its '=Differentia='.
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