from The Century Dictionary.
- noun A board of the water-wheel of undershot mills which receives the impulse of the stream by which the wheel is driven.
- noun One of the paddles of a steamer.
Sorry, no etymologies found.
But speedy emissaries revealed the unnatural secret, in the new float-board, wholly a foot in width, added to their already too high privileges by the dam proprietors.
SOO. \t hen a wheel is put in motion bj z stream of water striking against a float-board, the action of the water diminishes, as the velocity of the wheel increases, till at last the momentum of the water, or of the accelerating force, is just equal to the momentum of the resistance, or of the retarding force.