t are
tall," or "The soldiers of the Tenth Regiment are brave," I am
using the Name "soldiers of the Tenth Regiment" in the _first_
sense; and it is just the same as if I were to point to each of
them _separately_, and to say "_This_ soldier of the Tenth
Regiment is tall," "_That_ soldier of the Tenth Regiment is
tall," and so on.

But, when I say "The soldiers of the Tenth Regiment are formed
in square," I am using the phrase in the _second_ sense; and it
is just the same as if I were to say "The _Tenth Regiment_ is
formed in square."]

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CHAPTER V.

_DEFINITIONS._

It is evident that every Member of a _Species_ is _also_ a Member of the
_Genus_ out of which that Species has been picked, and that it possesses
the _Differentia_ of that Species. Hence it may be represented by a Name
consisting of two parts, one being a Name representing any Member of the
_Genus_, and the other being the _Differentia_ of that Species. Such a
Name is called a '=Definition=' of any Member of that Species, and to
give it such a Name is to '=define=' it.

[Thus, we may define a "Treasure" as a "valuable Thing." In this
case we regard "Things" as the _Genus_, and "valuable" as the
_Differentia_.]

The following Examples, of this Process, may be taken as models for
working others.

[Note that, in each Definition, the Substantive, representing a
Member (or Members) of the _Genus_, is printed in Capitals.]

1. Define "a Treasure."

_Ans._ "a valuable THING."

2. Define "Treasures."

_Ans._ "valuable THINGS."

3. Define "a Town."

_Ans._ "a material artificial THING, consisting of houses and streets."
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4. Define "Men."

_Ans._ "material, living THINGS, belonging to the Animal Kingdom, having
two hands and two feet";

or else

"ANIMALS having two hands and two feet."

5. Define "London."

_Ans._ "the material artificial THING, which consists of houses and
streets, and has four million inhabitants";

or else

"the TOWN which has four million inhabitants."

[Note that we here use the article "the" instead of "a", because
we happen to know that there is only _one_ such Thing.

The Reader can set himself any number of Examples of this
Process, by simply choosing the Name of any common Thing (such