Mr. Moore having ascertained that by applying two plain simple metalic apertures of the given sizes, he was not able to draw the same quantity in square inches of water, but only 65 and 2/3d per cent. of the amount, he therefore applied the adjutages described by Professor Venturi; and for these applications, which were alleged to be a breach of the contract, an action was instituted in the Supreme Court of Pennsylvania. It will be perceived that this case involved not only important principles of law, but interesting inquiries in hydrodynamics, to aid in the discussion of which, large draughts were made upon the scientific attainments of the accomplished bar of Philadelphia. For the plaintiff were engaged John Sergeant and Horace Binney, Esquires; but the absence of the latter gentleman at Congress, occasioned the retaining of C. Chauncey, Esquire; for the defendants were Joseph R. Ingersol and Peter A. Browne, Esquires. The cause occupied several days, during which time the court house was continually crowded with an intelligent audience. The questions were, first, whether the granter was confined to the use of _simple_ apertures of the dimensions mentioned in the deed, when it was apparent from the opinions of men of science, and from the experiments made before the jury, that through such openings it was not possible for him to draw more than 65 and 2/3d per cent. of the water contracted for, (it being a law of nature that when a fluid is drawn from a simple aperture or opening, the stream or vein is contracted so as to form the figure of a cone;) or whether the grantee was entitled, at all events, to his 300 inches of water, and had a right to affix adjutages to overcome this law of nature, and restore things to the state they were supposed to be in by the parties, if, when they contracted, they were ignorant of this principle. Second. The defendant having contracted for as much water as "_can pass_" through metalic apertures of given sizes, whether he was entitled, provided he did not increase the size of the openings, nor increase the head, so to adjust the adjutages as to draw _more_ water than 300 square inches; for it was proved by another set of experiments that, by reason of the adjutages at the defendant's mill, he had contrived, not only to overcome the _vena contracta_ or contracted vein, but to draw off more water than would have passed through a plain opening if the vena contracta did not exist.