need so much? 3. Which of these foods come from animals?
Which from plants? Which of them are the best "to grow on"? 4. How
much milk is there in the two bottles in the picture on p. 23? What is
the difference between milk and cream? Why is it better to buy bottled
milk than milk dipped out of a can? 5. Suppose that you are going to
get the breakfast in this house; how will you use some of the milk in
preparing it? How will you take care of what is left? 6. Why is milk
much better for you than coffee or tea? Where does the food strength
in the milk come from? 7. Suppose that you have just bitten off a
mouthful of food; what is the story of this mouthful before it is
taken into your blood? Where does most of it enter the blood? What
becomes of the part that the blood cannot use? Why is it very
necessary that this be disposed of regularly?

GOING TO SCHOOL

I. GETTING READY. 1. How is it best to dress in winter? Why? (If this
is hard to understand, think which would cool faster--hot soup in a
deep cup or the same soup poured out into a plate? In which dish would
the soup have the larger surface from which to let off the heat? You
may now weigh only half as much as you will when you are fully grown,
but you already have much more than half as much size or surface.) 2.
What quality should all clothing material have, and why?

II. AN EARLY ROMP. 1. Which makes you more tired, to walk slowly, just
"lagging along," for about twenty minutes, or to walk briskly for the
same time? Why? 2. How do you make your muscles strong? What is your
heart made of? How can you make your heart strong? 3. Why do you need
a heart? 4. What is your _pulse_? Where can you easily feel a pulse?
Count the pulse of someone else for half a minute by a watch. Do this
accurately. How many beats would there be in a minute? Try this with
different classmates. 5. What do we call the tubes through which the
blood flows away from the heart? The tubes through which it flows back
to the heart? 6. What is happening to the blood on its "round trip"?
Where does it get the liquid food that it delivers to the muscles? Why
must the blood be carried away from the muscles?

III. FRESH AIR--WHY WE NEED IT. 1. If you were asked how we can tell
that air is everywhere, what could you say? 2. What do we call a thin
light substance like air? 3. What proof have we that the body needs
it? How does it get around to the different parts of the body? 4. What
is the body--its