Mr. Brooke, I believe, took out a patent for an iron-clad with slanting roof and submerged ends like the Merrimac. As neither the Secretary nor myself had noticed Constructor Porter's published claims, I thought it advisable to bring the subject before the examiners of the Patent Office while it was before the public. I therefore applied for a patent, and in order that there should be no ground for dispute as to the correspondence of my specific claim with the original plan, I presented tracings of the identical drawing which Constructor Porter made of my plan, as stated by the Secretary in his report to the House of Representatives of the Confederate States. They were filed May 2, 1862, in the Patent Office. The drawings accompanying this article are from the patent, reduced to one-fifth of the original scale.
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