Science in Short ChaptersWilliams, W. Mattieu (William Mattieu)
Science
Science in Short Chapters
Williams, W. Mattieu (William Mattieu)
Science
An artificial anthracite may be made by heating coal in a closed vessel
of sufficient strength to resist the expansion of the gases that are
formed. It differs from coke in being compact, is not porous, and
therefore, of course, much denser, a given weight occupying less space.
That we Englishmen should be about the last of all the coal-using
peoples to apply anthracite to domestic purposes is a very curious
fact, but so it is. In America it is the ordinary fuel, and this is
the case in all other countries where it is obtainable at the price
of bituminous coal. Our perversity in this respect shows out the more
strikingly when we go a little further into the subject by comparing
the two classes of coal in reference to our methods of using them,
and when we consider the fact that our South Wales anthracite is far
superior to the American.
Our open fires only do their small fraction of useful work by
radiation. Their convection is all up the chimney. Such being the case,
and we being theoretically regarded as rational beings, it might be
supposed that for our national and especially radiating fireplaces we
should have selected a coal of especial radiating efficiency, but,
instead of this, we do the opposite. The flaming coal is just that
which flings the most heat up the chimney, and the least into the
room, and, as though we were all struggling to destroy as speedily as
possible the supposed physical basis of our prosperity, we select that
coal which in our particular fire-places burns the most wastefully. If
we had closed iron stoves with long stove-pipes in the room, giving
to the air the heat they had obtained by the convective action of the
flame and smoke, there might be some reason for using the flaming coal,
as the flame would thereby do useful work, but, as it is, we stubbornly
persist in using only the radiated heat, and at the same time select
just the coal which supplies the smallest quantity of what we require.
No scientific dissertation is necessary to prove the superior radiating
power of an anthracite fire to anybody who has ever stood in the front
of one. This is most strikingly demonstrated by those grates that stand
well forward, and are kept automatically filled with the radiant-carbon.
Public-domain text, read in full here on John Shaqi.
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