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Railroads and bricks. Beautiful.
There are many amazing things in the two links.
Two top ones are "The Göltzsch Viaduct was an extraordinarily large endeavor for its time. Each day, the nearly 20 brickyards along the railway line would produce 50,000 bricks ..."
And for the London-Brighton line "a decision to limit gradients along the line to 1 in 264."
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