"In the fifth place, the said Jethro Wood claims an exclusive right to his invention and improvement in the mode of fitting, adapting and adjusting the cast iron landside to the cast iron mould-board. Their junction is after the manner of tenon and mortice; the tenon being at the fore end of the land-side and the mortice being at the inside of the mould-board and near its point. The tenon and mortice are joggled, or dove-tailed together in the casting operation, so as to make them hold fast. The fore end of the tendon is additionally secured by a cast projection from the inside of the mould-board for its reception; and if any other tightening or bracing should be requisite, a wooden wedge, well driven in, will bind every part effectually, and all this is accomplished without the assistance or instrumentality of screws. "The said inventor and petitioner wishes it to be understood, that the principal metallic material of his Plough is cast iron. He has very little use for wrought iron, and by adapting the former to the extent he has done, and by discontinuing the latter, he is enabled to make the Plough stronger and better, as well as more lasting and cheap. "He also claims, and hereby asserts the right, of varying the dimensions and proportions of his Plough, and of its several sections and parts, in the relations of somewhat more and somewhat less of length, breadth, thickness, and composition, according to his judgment or fancy, so that all the while he adheres to his principle and departs not from it. "Regarding each and every of the matters submitted as very conducive to the reputation and emolument of the said Jethro Wood, he relies confidently upon a benign and favorable construction of his petition and specification, by the constituted authorities of his country. "Given under his hand, at the city of New York, this fourteenth day of August, one thousand eight hundred and nineteen (1819), in the presence of two witnesses, to wit: "SAM'L L. MITCHELL, } "J. G. BOGERT. } JETHRO WOOD."