has to look after and remember all that has to be done in the house.
Just think what a relief it would be to her to possess a machine which
should sweep the rooms, cook the dinners, wash the plates, mend torn
clothes, and keep watch over everything without giving her any trouble;
and, moreover, make no more noise or fuss than yours does, which has
been working away ever since you were born without your ever troubling
your head about it, or probably even knowing of its existence! Just
think of this and be thankful.

But do not fancy you are the only possessor of a magical machine of
this sort. Your kitten has one also, and the ox we were speaking of,
and all other living creatures. And theirs render the same service to
them that yours does to you, and much in the same way; for all these
machines are made after one model, though with certain variations
adapted to the differences in each animal. And, as you will see
by-and-by, these variations exactly correspond with the different sort
of work that has to be done in each particular case. For instance,
where the machine has grass to act upon, as in the ox, it is differently
constructed from that in the cat which has to deal with meat and mice.
In the same way in our manufactories, though all the spinning-machines
are made upon one model, there is one particular arrangement for those
which spin cotton, another for those which spin wool, another for flax,
and so on.

But, further:

You have possibly noticed already, without being told, that all animals
are not of equal value; or, at least, to use a better expression, they
have not all had the same advantages bestowed on them. The dog, for
instance, that loving and intelligent companion, who almost reads your