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In 1781, being promised the help of the Government, he began the construction of his pyroscaphe at Lyons.
Ten years later, having constructed a _pyroscaphe_ [steamboat] which voyaged along the Saone, from Lyons to Isle Barbe, Jouffroy presented a petition to Cabinet Minister Calonne and to the
Robert Fulton himself had testified that "if the glory (of imagining the first pyroscaphe) belongs to any one man, it belongs to the author of the experiments made on the River Saône at Lyons in