. Scientific American 05 Volume Numéro 01 (juillet 1861). d'un côté ning ou autres. Somuch pour un sol en bois et se termine, au lieu d'thesharp à fond, avec une grande hauteur, de nos bâtisseurs, thinkingthat voiles, pas de la vapeur, le pouvoir. À Newcastle-on-Tyne plusieurs naviguent ainsi que sur l'Southamptonand Île de Wight. Ces bateaux ont leur decksextended à la largeur de la palette-boîtes, sur les poutres sup-porté par les bras. Ainsi, un bateau à vapeur de 16 m largeur willhave le pont principal de 25 à 30 pieds et donnant de 50 à 80 pour cent de plus de place, et si elle aurait une hurricanedeck, à partir de 2

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. Scientific American Volume 05 Number 01 (July 1861). ning to one side or other. Somuch for flat floors and fine wooden ends, instead of thesharp bottoms, with a great rise, of our builders, thinkingthat sails, not steam, were the power. In Newcastle-on-Tyne several are plying as well as on the Southamptonand Isle of Wight station. These boats have their decksextended to the width of the paddle-boxes, on beams sup-ported by sponsons. Thus, a steamer of 16 feet width willhave the main deck from 25 to 30 feet, giving from 50 to 80per cent more room, and if she would have a hurricanedeck, from 200 to 300 per cent without extra fuel or labor.Their draft of water is but 2i feet, with a speed of 16 miles. Gun Cotton for Shells.—Gun cotton burns so sud-denly that it is apt to burst cannon, if used in themin place of gunpowder. But it has been suggested tous that this same property peculiarly fits this sub-stance for the charging Of bomb shells. We do notsee why the idea is not a good one. H861 SCIENTIFIC AMERICAN, INC. ®foe Mmtxik ^mttim. 13. ISSUED FROM THE UNITED STATES PATENT OFFICE FOR THE WEEK ENDING JUNE 11, 1861. teially for the Scientific American. *#* Pamphlets giving full particulars of the mode of applying forpatents, under the new law which went into force March 4, 1861, speci-fying size of model required, and much other information useful toinventors, may be had gratis by addressing MUNN & CO., Publishersof the Scientific American, New York. 1, 498.—Hiram Aldridge, of Michigan City, Ind., for an Im-provement in Machines for Thrashing and SeparatingGrain: I claim, first, Thearrangement on the front of the concave, A, of athrashing machine of two slotted and perforated ears, a a, said earsserving as guide ways for pins, b b, and as bearings for the upperends of the adjusting hand screws, D, which are located in front of theconcave and within the frame or the thrashing machine, all in themanner and forthe purpose described. Second, The arched or raised cover

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