the life of thomas telford-第55章
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a new channel for the river was excavated; which further enlarged
the floating space and wharf accommodation; wet and dry docks were
added; until at length the quay berthage amounted to not less than
6290 feet; or nearly a mile and a quarter in length。 By these
combined improvements an additional extent of quay room was
obtained of about 4000 feet; an excellent tidal harbour was formed;
in which; at spring tides; the depth of water is about 15 feet;
while on the bar it was increased to about 19 feet。 The prosperity
of Aberdeen had meanwhile been advancing apace。 The city had been
greatly beautified and enlarged: shipbuilding had made rapid
progress; Aberdeen clippers became famous; and Aberdeen merchants
carried on a trade with all parts of the world; manufactures of
wool; cotton; flax; and iron were carried on with great success;
its population rapidly increased; and; as a maritime city; Aberdeen
took rank as the third in Scotland; the tonnage entering the port
having increased from 50;000 tons in 1800 to about 300;000 in
1860。
Improvements of an equally important character were carried out by
Mr。 Telford in the port of Dundee; also situated on the east coast
of Scotland; at the entrance to the Frith of Tay。 There are those
still living at the place who remember its former haven; consisting
of a crooked wall; affording shelter to only a few fishing…boats or
smuggling vesselsits trade being then altogether paltry; scarcely
deserving the name; and its population not one fifth of what it now
is。 Helped by its commodious and capacious harbour; it has become
one of the most populous and thriving towns on the east coast。
'Image' Plan of Dundee Harbour。
The trade of the place took a great start forward at the close of
the war; and Mr。 Telford was called upon to supply the plans of a
new harbour。 His first design; which he submitted in 1814; was of
a comparatively limited character; but it was greatly enlarged
during the progress of the works。 Floating docks were added; as
well as graving docks for large vessels。 The necessary powers were
obtained in 1815; the works proceeded vigorously under the Harbour
Commissioners; who superseded the old obstructive corporation; and
in 1825 the splendid new floating dock750 feet long by 450 broad;
having an entrance…lock 170 feet long and 40 feet widewas opened
to the shipping of all countries。
'Image' Dundee Harbour。
Footnotes for Chapter IX。
*'1' Hugh Millar; in his 'Cruise of the Betsy;' attributes the
invention of columnar pier…work to Mr。 Bremner; whom he terms 〃the
Brindley of Scotland。〃 He has acquired great fame for his skill in
raising sunken ships; having warped the Great Britain steamer off
the shores of Dundrum Bay。 But we believe Mr。 Telford had adopted
the practice of columnar pier…work before Mr。 Bremner; in forming
the little harbour of Folkestone in 1808; where the work is still
to be seen quite perfect。 The most solid mode of laying stone on
land is in flat courses; but in open pier work the reverse process
is adopted。 The blocks are laid on end in columns; like upright
beams jammed together。 Thus laid; the wave which dashes against
them is broken; and spends itself on the interstices; where as;
if it struck the broad solid blocks; the tendency would be to lift
them from their beds and set the work afloat; and in a furious
storm such blocks would be driven about almost like pebbles。
The rebound from flat surfaces is also very heavy; and produces
violent commotion; where as these broken; upright; columnar…looking
piers seem to absorb the fury of the sea; and render its wildest
waves comparatively innocuous。
*'2' 'Memorials from Peterhead and Banff; concerning Damage
occasioned by a Storm。' Ordered by the House of Commons to be
printed; 5th July; 1820。 '242。'
*'3' 'A Description of Bothe Touns of Aberdeene。' By James Gordon;
Parson of Rothiemay。 Reprinted in Gavin Turreff's 'Antiquarian
Gleanings from Aberdeenshire Records。' Aberdeen; 1889。
*'4' Robertson's 'Book of Bon…Accord。'
*'5' Ibid。; quoted in Turreff's 'Antiquarian Gleanings;' p。 222。
*'6' One of them; however; did returnPeter Williamson; a native
of the town; sold for a slave in Pennsylvania; 〃a rough; ragged;
humle…headed; long; stowie; clever boy;〃 who; reaching York;
published an account of the infamous traffic; in a pamphlet which
excited extraordinary interest at the time; and met with a rapid
and extensive circulation。 But his exposure of kidnapping gave
very great offence to the magistrates; who dragged him before their
tribunal as having 〃published a scurrilous and infamous libel on
the corporation;〃 and he was sentenced to be imprisoned until he
should sign a denial of the truth of his statements。 He brought an
action against the corporation for their proceedings; and obtained
a verdict and damages; and he further proceeded against Baillie
Fordyce (one of his kidnappers; and others; from whom he obtained
200L。 damages; with costs。 The system was thus effectually put a
stop to。
*'8' 'A Description of Bothe Touns of Aberdeene。' By James Gordon;
Parson of Rothiemay。 Quoted by Turreff; p。 109。
*'8' Communication with London was as yet by no means frequent;
and far from expeditious; as the following advertisement of 1778
will show:〃For London: To sail positively on Saturday next; the
7th November; wind and weather permitting; the Aberdeen smack。
Will lie a short time at London; and; if no convoy is appointed;
will sail under care of a fleet of colliers the best convoy of any。
For particulars apply;〃 &c。; &c。
*'9' 〃The bottom under the foundations;〃 says Mr。 Gibb; in his
description of the work; 〃is nothing better than loose sand and
gravel; constantly thrown up by the sea on that stormy coast;
so that it was necessary to consolidate the work under low water by
dropping large stones from lighters; and filling the interstices
with smaller ones; until it was brought within about a foot of the
level of low water; when the ashlar work was commenced; but in
place of laying the stones horizontally in their beds; each course
was laid at an angle of 45 degrees; to within about 18 inches of
the top; when a level coping was added。 This mode of building
enabled the work to be carried on expeditiously; and rendered it
while in progress less liable to temporary damage; likewise
affording three points of bearing; for while the ashlar walling was
carrying up on both sides; the middle or body of the pier was
carried up at the same time by a careful backing throughout of
large rubble…stone; to within 18 inches of the top; when the whole
was covered with granite coping and paving 18 inches deep; with a
cut granite parapet wall on the north side of the whole length of
the pier; thus protected for the convenience of those who might
have occasion to frequent it。〃Mr。 Gibb's 'Narrative of Aberdeen
Harbour Works。'
CHAPTER X。
CALEDONIAN AND OTHER CANALS。
The formation of a navigable highway through the chain of locks
lying in the Great Glen of the Highlands; and extending diagonally
across Scotland from the Atlantic to the North Sea; had long been
regarded as a work of national importance。 As early as 1773;
James Watt; then following the business of a land…surveyor at Glasgow;
made a survey of the country at the instance of the Commissioners
of Forfeited Estates。 He pronounced the canal practicable; and
pointed out how it could best be constructed。 There was certainly
no want of water; for Watt was repeatedly drenched with rain while
he was making his survey; and he had difficulty in preserving even
his journal book。 〃On my way home;〃 he says; 〃I passed through the
wildest country I ever saw; and over the worst conducted roads。〃
Twenty years later; in 1793; Mr。 Rennie was consulted as to the
canal; and he also prepared a scheme: but nothing was done。 The
project was; however;