Mode « mais si, promis, ça va tiendre ! » =)
Vous ne me croyez pas ?
Bon, ben regardez, une démo vaut bien mieux que quelques doutes.
A demonstration of the cantilever principle of the Firth of Forth Bridge (Great Britain, 1887).
The photo was taken for a lecture on the construction of the bridge at the Royal Institution.
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The photo was taken for a lecture on the construction of the bridge at the Royal Institution.
facebook.com/HistoricPhotographs