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126 X. THE ARCH LINE. CONSTRUCTION.
its shape. So the arch line is the moral character of the arch,
and the adverse forces are its temptations; and the voussoirs,
and what else we may help it with, are its armor and its
motives to good conduct.
§ vii. This moral character of the arch is called hj architects its " Line of Resistance." There is a great deal of nicety
in calculating it with precision, just as there is sometimes in
finding out very precisely what is a man's true line of moral
conduct; but this, in arch morality and in man morality, is a
very simple and easily to be understood principle,—that if
either arch or man expose themselves to their special temptations or adverse forces, outside of the voussoirs or proper
and appointed armor, both will fall. An arch whose line of
resistance is in the middle of its voussoirs is perfectly safe:
in proportion as the said line runs near the edge of its voussoirs,
the arch is in danger, as the man is who nears temptation; and
the moment the line of resistance emerges out of the voussoirs
the arch falls.
§ viii. There are, therefore, properly speaking, two arch
lines. One is the visible direction or curve of the arch, which
may generally be considered as the under edge of its voussoirs,
and which has often no more to do with the real stability of
the arch, than a man's apparent conduct has with his heart.
The other line, which is the line of resistance, or line of good
behavior, may or may not be consistent with the outward and
apparent curves of the arch; but if not, then the security of
the arch depends simply upon this, whether the voussoirs
which assume or pretend to the one line are wide enough to
include the other.
§ ix. Now when the reader is told that the line of resistance
varies with every change either in place or quantity of the
weight above the arch, he will see at once that we have no
chance of arranging arches by their moral characters: we can
only take the apparent arch line, or visible direction, as a
ground of arrangement. We shall consider the possible or
probable forms or contours of arches in the present Chapter,
and in the succeeding one the forms of voussoir and other help
| Title | The stones of Venice - 1 |
| Creator | Ruskin, John |
| Publisher | J. Wiley |
| Place of Publication | New York |
| Date | 1889 |
| Language | eng |
| Type | Books/Pamphlets |
| Title | 00000151 |
| Type | Books/Pamphlets |
| Transcript | 126 X. THE ARCH LINE. CONSTRUCTION. its shape. So the arch line is the moral character of the arch, and the adverse forces are its temptations; and the voussoirs, and what else we may help it with, are its armor and its motives to good conduct. § vii. This moral character of the arch is called hj architects its " Line of Resistance." There is a great deal of nicety in calculating it with precision, just as there is sometimes in finding out very precisely what is a man's true line of moral conduct; but this, in arch morality and in man morality, is a very simple and easily to be understood principle,—that if either arch or man expose themselves to their special temptations or adverse forces, outside of the voussoirs or proper and appointed armor, both will fall. An arch whose line of resistance is in the middle of its voussoirs is perfectly safe: in proportion as the said line runs near the edge of its voussoirs, the arch is in danger, as the man is who nears temptation; and the moment the line of resistance emerges out of the voussoirs the arch falls. § viii. There are, therefore, properly speaking, two arch lines. One is the visible direction or curve of the arch, which may generally be considered as the under edge of its voussoirs, and which has often no more to do with the real stability of the arch, than a man's apparent conduct has with his heart. The other line, which is the line of resistance, or line of good behavior, may or may not be consistent with the outward and apparent curves of the arch; but if not, then the security of the arch depends simply upon this, whether the voussoirs which assume or pretend to the one line are wide enough to include the other. § ix. Now when the reader is told that the line of resistance varies with every change either in place or quantity of the weight above the arch, he will see at once that we have no chance of arranging arches by their moral characters: we can only take the apparent arch line, or visible direction, as a ground of arrangement. We shall consider the possible or probable forms or contours of arches in the present Chapter, and in the succeeding one the forms of voussoir and other help |
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