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Bouguer's teori
Bouguer's teori/lrestning: Der beregner sejltrkkraft.
A ship would go fastest when the tangent of the angle between wind and sail was double that between keel and sail // Bouguer's Theorem.
Andre beregnere som Bourd de Villehuet (1769), Steel (1794), Blunt (1824), R. Hall Gower (1808) og Causs og Murphy (1849) benytter ogs direkte el. i tillempet form Bouguers lrestning.
[SEHA p.61]  Kilder