Abstract
SOME thirty-two years ago, G. Denil, at that time chief engineer of Belgian Public Works, stood by a new weir, 3·5 m. in height, and lacking a fishpass of any kind whatever. As he watched the tail water of the dam, he was struck by the frantic and necessarily unsuccessful efforts of many salmon to surpass this obstacle by leaps, and also their wholesale destruction following exhaustion, by their overcrowding in a restricted channel, and at the hands of fishermen who had no difficulty in capturing their helpless prey. La mecanique du poisson de riviere Qualites nautiques du poisson; ses methodes locomotrices, ses capacites; ses limites; resistances du fluide; effet de la vitesse, de la pente; resistance de seuil. Par G. Denil. Pp. 395. (Bruxelles:Goemaere, Imprimeure du Roi, 1938.) n.p.
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