ed
snuffing? Let in fresh air; because the air is then unwholesome for want
of oxygen; which, carried to a great extent, would cause fainting in the
people, and would extinguish the candles themselves.--When a fire is
like to go out, what should be done? Blow it up with bellows. Why not by
the mouth? Because the air blown from the lungs has lost great part of
its oxygen, by which alone the fire burns. Why then does a fire blown
with the mouth burn at all? Because part of the oxygen remains, said one
boy; and another added, "and because part of the surrounding air is
blown in along with it."

At the second meeting with these boys, occasioned by the unexpected
circumstances formerly alluded to, they were summarily, and without
previous notice, taken from their school to another public meeting,
without knowing for what purpose they were brought, and had to undergo a
still more searching examination on what they had been previously
taught. Here again they shewed their dexterity in making use of their
lessons, by the application of them, and proved that they had been doing
so to themselves in the intercourse which they had had with their
relations at home. The account goes on to say, that "they were then more
fully and searchingly examined than at first; and there being more time,
they were much longer under the exercise. It was then found, that the
information formerly communicated was not only remembered, but that the
several truths were much more familiar, in themselves and in their
connection with each other, than they had been at the former meeting.
This had evidently arisen from their own frequent meditations upon them
since that time, and their application of the several lessons, either
with one another, their parents, or themselves. The medical gentlemen
were again present, and professed themselves equally pleased. The
lessons, _with considerable additions_, were also given, and the
applications especially were greatly extended. In these last they
appeared to be perfectly at home; and relevant circumstances might have
been multiplied for double the time, without their having any difficulty
in applying the lessons, and giving a reason for their application."

But the most satisfactory of all the experiments on this point, as
implying the possession of a well-cultivated mind, holding at command an
extensive field of useful knowledge, was the one in Leith, although
from accident, or inadvertence on the part of the repo