"All your answers are right, for many different kinds of bread are used
in various parts of the country; but whether it is made from
wheat-flour, or rye-flour, or corn-meal, it all grows from the ground,
does it not?

"Now the next sort of food--meat, the flesh of animals--oxen, sheep,
pigs, and poultry--what do they feed on?"

"Oxen eat grass and hay and meal," said Dodo, in great haste lest some
one else should speak first.

"Sheep eat grass and hay too. I've seen them over in the pasture on the
hill," said Nat.

"Pigs will eat any old sort of thing," said Rap. "Sour milk and snakes
and swill and rats."

"Ugh!" shivered Dodo. "Are all those nasty things in sausages?" "No,
Dodo," laughed the Doctor; "when pigs are shut up they eat a great many
dirty things, but naturally they prefer clean food like other cattle--
corn, acorns, apples, and so forth. Besides, those 'nasty things,' as
you call them, turn into pork before they are put in sausages, for pigs
know how to make pork. So you see that all the food of the animals whose
flesh we eat comes out of the ground; and that is what the Bible means
where it says, 'All flesh is grass.' But what other things are there
that grow up out of the earth, tall and strong, each one holding a
beautiful green screen to keep the sun from drawing all the moisture
from the ground and making it too dry; shading the rivers that their
waters may not waste away; some making cool bowers for House People to