What is Ajutage?

Legal Definition
A conical tube, used in drawing water through an aperture, by the use of which the quantity of water drawn is much increased. When a privilege to draw water from a canal through the forebay or tunnel by means of in aperture has been granted, it is not lawful to add an adjutage, unless such was the intention of the parties. 2 Whart. R. 477.
-- Bouviers Law Dictionary
Legal Definition
A tube, conical in form, intended to be applied to an aperture through which water passes, whereby the flow of the water is greatly increased. See Schuylkill Nav. Co. v. Moore, 2 Whart. (Pa.) 477.
-- Black's Law Dictionary