medicines have to be admitted sometimes--despite their
unpleasantness--because they, too, have to work in the chimney. Taste
does not deceive you about them, however; they are not intended to
serve as food. If any one should try to breakfast, dine, and sup upon
physic he would soon find this out.

Besides, I only said _almost_ always, in speaking of unwholesome
food making itself known to us by its nasty taste; for it is an
unfortunate truth that men have invented a thousand plans for baffling
their natural guardian, and for bringing thieves secretly into the
company of honest people. They sometimes put poison, for instance,
into sugar--as is too often done in the case of those horrible green
and blue sugar plums, against which I have an old grudge, for they
poisoned a friend whom I loved dearly in my youth. Such things as these
pass imprudently by the porter, who sees nothing of their real
character--Mr. Sugar concealing the rogues behind him.

Moreover, we are sometimes so foolish as not to leave the porter time
to make his examination. We swallow one thing after another greedily,
without tasting; and such a crowd of arrivals, coming in with a rush,
"forces the sentry," as they say; and whose fault is it, if, after
this, we find thieves established in the house?

But animals have more sense than we have.

Look at your kitten when you give her some tit-bit she is not acquainted
with--how cautiously and gently she puts out her nose, so as to give
herself time for consideration. Then how delicately she touches the
unknown object with the tip of her tongue, once, twice, and perhaps
three times. And when the tip of the tongue has thus gone forward