Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . Copper Battery. — It has been stated, in ^ 31, thatthe zinc soon becomcjs coated withoxide of copper or pulverulent me-tallic copper, and the action of thebattery consequently declines. Now,the efficiency of sulphate of copperin providing oxide of copper toundergo decomposition in place ofwater, is equally great in the finalresult when it forms only that partof the solution next the copper plate,xiccordingly, by interposing a cellof porous earthen war
Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . Copper Battery. — It has been stated, in ^ 31, thatthe zinc soon becomcjs coated withoxide of copper or pulverulent me-tallic copper, and the action of thebattery consequently declines. Now,the efficiency of sulphate of copperin providing oxide of copper toundergo decomposition in place ofwater, is equally great in the finalresult when it forms only that partof the solution next the copper plate,xiccordingly, by interposing a cellof porous earthen ware between the zinc and cop-per, two cells are produced, in the outer one of whichsulphate of copper may be used, and in the inner onea solution of Glaubers salt (sulphate of soda), or com-mon salt. These do not coat the zinc, though suf-ficient of the copper solution will eventually passthrough to make it necessary occasionally to cleanthe zinc plate. Dilute sulphuric acid may also beused in the inner cell; but in this case, it is necessaryor advisable to amalgamate the zinc. A lip will beobserved in the figure, which is used for adding. 24 DAVI S S MANUAL. crystals of sulphate of copper to the solution as itsstrength declines. 36. Fig. 14 shows the internal construction ofthis form. In the centre is seen a solid rod of zinc, Fig. 14.
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectmagnetism, bookyear18
