Mechanics' magazine and register of inventions and improvements . would begreatly assisted by the spring of the men of war. East and West India ships,and, in general, in all vessels which eithercarry no cargoes, or their cargoes in pack-ages, these percolators may be readily madeof strong and thick oak battens, fastened tothe ceiling close to the water-courses, andraised, say from 6 or 8 inches high, abovethe ceiling, with notches cut in the underedges or sides of them, similar to, I believe,the practice in the navy. These v;ater-coursesto be covered with limber boards, as at pre-sen
Mechanics' magazine and register of inventions and improvements . would begreatly assisted by the spring of the men of war. East and West India ships,and, in general, in all vessels which eithercarry no cargoes, or their cargoes in pack-ages, these percolators may be readily madeof strong and thick oak battens, fastened tothe ceiling close to the water-courses, andraised, say from 6 or 8 inches high, abovethe ceiling, with notches cut in the underedges or sides of them, similar to, I believe,the practice in the navy. These v;ater-coursesto be covered with limber boards, as at pre-sent, and the boards would not be requii-edto be tight on the top ; the boards to besloped up to the kelson.—P. 20. Mr. Ballingall does not propose these per-colators simply because they obviate the ob-jection before stated to the caulking of theceiling, but for this further reason, that,whether the ceiUng is caulked or not, theyfurnish a better means of conveying the wa-terto the pumps, and keeping the pumps clear 164 BallingalVs Improvements in than any now in use, while at the same timethey contribute considerable additional stabi-lity to the vessel. The explanations on thishead are too long for quotation, but are toour minds entirely satisfactory.^ The better to elucidate these different im-provements, we copy from Mr. BaUingallsbook the accompanying illustrative 1 is part of a transverse section of ashfp built on Mr. BaUingalls plan, and a continuation of that section (part brokenoff.) TT is the compact floor, with its bot-tom and ceiling planking. AA are guardsfitted to protect the percolators from damageby shovels, &c. in taking out ballast or un-loading a cargo. BE spaces filled with tan-ners bark, charcoal, &c. or such substancesas will allow the water to flow freely throughthem, and keep back sand, and so preventthe copper strainers, on the outer edge ofthe percolators, from being choked. CC thecopper stramer^ (shown by double lines
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