"Here is a picture of the White-throated Sparrow, drawn so big you can see it almost across the room, with all the outside parts of which you must learn the names.

You see the names are all on the picture, too; I am going to make it smaller, and put it in the book I will write for you, so you can look at it whenever you wish.
"It is almost dinner-time now, and you must be very hungry.

But now I must tell you one thing more.

You know there are so many, many different kinds of birds and other animals that nobody could remember them unless they were classified.

To classify is to put things that are most alike closest together, then next nearest them things that are next most alike, and to keep furthest apart those things that are least alike.