FOOTNOTES:
[13] See Third Book.
LESSON XVI.
A LOOK AT A HOUSE-FLY.
Look at a worm crawling about on the earth. Then look at a fly with blue or green body and thin wings. See how it whirls in the air! You will say, “These two are not at all alike.”
Yet there is one time in a fly’s life when it is very like a worm.
For this reason many wise people set flies and worms next to each other when they study them.
You know, as soon as you look at a fly, that it is an insect.
You have learned that an insect has wings, six legs, a body in three parts, and a pair of feelers like horns.
Insects breathe through all the body, and not by lungs as you do. They have a row of holes in each side to breathe through.