The Blood Corpuscles.~--If you should look at a tiny drop of blood through such a microscope, you would find it to be full of very small, round objects called _blood corpuscles_.
~4.~ You would notice also that these corpuscles are of two kinds.

Most of them are slightly reddish, and give to the blood its red color.

A very few are white.
~5.

Use of the Corpuscles.~--Do you wonder what these peculiar little corpuscles do in the body?
They are very necessary.

We could not live a moment without them.