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Welsh Achievements - in science, technology and engineering (PDF

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1806 Cyfarthfa ironworks is the largest <strong>in</strong> the world until<br />

overtaken by Dowlais <strong>in</strong> 1822.<br />

1805 open<strong>in</strong>g of Pontcysyllte aqueduct, Thomas Telford’s<br />

1007ft (307 m) long multi-arch iron <strong>and</strong> masonry<br />

structure carry<strong>in</strong>g the canal <strong>in</strong> a cast-iron trough 126<br />

ft (38 m) high over the river Dee. Then the highest<br />

aqueduct <strong>in</strong> the world <strong>and</strong> rema<strong>in</strong>s Brita<strong>in</strong>’s highest<br />

aqueduct.<br />

1804 Steam locomotive built by Richard Trevithick makes the<br />

first steam railway journey <strong>in</strong> the world from Merthyr<br />

Tydfil to Abercynon.<br />

1793 World’s first iron railway bridges, at Pontycafnau <strong>and</strong><br />

Cyfarthfa.<br />

1774 John Wilk<strong>in</strong>son <strong>in</strong>vents high-accuracy bor<strong>in</strong>g of cyl<strong>in</strong>ders<br />

at Bersham, used firstly for the production of cannons<br />

<strong>and</strong> later for steam eng<strong>in</strong>e cyl<strong>in</strong>ders.<br />

1755 Pontypridd bridge completed by local mason William<br />

Edwards across the river Taff. At 140 ft (42 metres) it is<br />

the longest stone span <strong>in</strong> Western Europe.<br />

1762 World’s earliest recorded railway tunnel, L<strong>and</strong>ore.<br />

1697 The first sheet iron roll<strong>in</strong>g mill <strong>in</strong> the world opened <strong>in</strong><br />

Pontypool.<br />

1672 Completion of Tredegar House, newport, one of the<br />

f<strong>in</strong>est 17th century houses <strong>in</strong> Brita<strong>in</strong>.<br />

16th century<br />

Tidal mill built at Carew adjo<strong>in</strong><strong>in</strong>g the 13th century<br />

castle for gr<strong>in</strong>d<strong>in</strong>g corn.<br />

77<br />

15

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