There are four abutments, but my photograph shows only one; and it
omits also the main thing of all--the means by which the metal chains
are anchored. Still, the abutment is entertaining. It is a stone
pillar about five feet high, perhaps a little more or less; it seems
to be old, and from two holes pierced through it we learn that several
experiments were made before the right leverage was obtained. The first
hole was too low down, so another was drilled about 12 inches above it,
and through this second hole the chain was passed, then tugged down to
its anchorage. Even then the suspension was not effective, the hole
or “saddle” being still not high enough above the footway, and the
builders knew not what to do. Not only was there insufficient space
for a third hole, but very few makers of suspension bridges have been
reasonable enough to pass their metal chains _over the summits_ of
stone pillars and towers. The Chinese workmen at Auhsien were not more
foolish than many European engineers have been, for their perforated
pillars are not a bit worse than the perforated towers through which
suspension chains pass at Clifton and at Budapest, not to mention many
other familiar examples. So determined were the Chinese to overcome
their difficulties without using the summit of their pillar, that they
cut away the stone until they came to the second hole or saddle, and
then they thrust a lump of iron under the taut chain. Next, to increase
the tension still more, they put up a smaller pillar perhaps a yard
from the first one, forcing it under the iron rods, which at this
point strain downward to their anchorage. Curiously enough, the lesser
pillar--a sort of understudy--is used as an architect would employ it:
along the top a groove is hollowed, and the chain rests in the groove
and then dips down at a sharp angle. Perhaps, then, the smaller pillar
is fairly new, while the larger one is old.
The Rev. O. M. Jackson[141] knows this bridge very well; he lived for
five years at Auhsien, and on one occasion the whole bridge was washed
away by a spate. For months the iron chains lay here and there on the
river-bed; and as floods are frequent, and the bridge is not a high
one, very little of the workmanship has had a chance of growing hoar.
The pillars have the best chance; and I suppose the iron chains are
worth saving from the river whenever the bridge is reconstructed.
Public-domain text, read in full here on John Shaqi.
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