. Notes on torpedoes, offensive and defensive. w-piece to keep everything water-tight, as described in page90, Fig. 33; (e) is a wooden jacket of fir, conical in form,to protect the iron cylinder from injury when subjectedto blows from friendly passing ships. The wood of whichthe jacket is composed should be well seasoned, thoroughlysaturated in tar, and subsequently painted to keep the wateras much as possible from entering into its pores after sub-mersion, so that tne buoyancy of the wooden jacket mayincrease the flotation. The case is intended essentially fora contact charge, and a maximum
. Notes on torpedoes, offensive and defensive. w-piece to keep everything water-tight, as described in page90, Fig. 33; (e) is a wooden jacket of fir, conical in form,to protect the iron cylinder from injury when subjectedto blows from friendly passing ships. The wood of whichthe jacket is composed should be well seasoned, thoroughlysaturated in tar, and subsequently painted to keep the wateras much as possible from entering into its pores after sub-mersion, so that tne buoyancy of the wooden jacket mayincrease the flotation. The case is intended essentially fora contact charge, and a maximum of buoyancy is absolutelynecessary. The wooden jacket is bound together by ironbands and provided with a ring (/) at the top, from whichto suspend the case for mooring purposes. The whole ofthe iron work of the case should be painted two coats, andtested up to a pressure of 10 pounds on the square inch, mentions. 299 . ^dually increasing from within. The calculated weight of this case, complete with circuit closer and charge, is Fig. 113. sri. Sectivru.
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherwashi, bookyear1872
