Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . water of the acidsolution may also be considered as undergoing de-composition, one atom of its oxygen uniting withone atom of zinc, in order to enable the sulphuricacid to unite with the resulting oxide of zinc, andthe corresponding atom of hydrogen being given ofiin contact with the platinum. It will be observedthat the oxygen and hydrogen appear at the oppositesides of the fluid undergoing decomposition. It isnot, however, believed that these elemen
Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . water of the acidsolution may also be considered as undergoing de-composition, one atom of its oxygen uniting withone atom of zinc, in order to enable the sulphuricacid to unite with the resulting oxide of zinc, andthe corresponding atom of hydrogen being given ofiin contact with the platinum. It will be observedthat the oxygen and hydrogen appear at the oppositesides of the fluid undergoing decomposition. It isnot, however, believed that these elements travelthrough the intervening distance, but that the twoatoms of water in contact with the plates are simul-taneously decomposed, and that a chemical equilib-rium is then established by a progressive exchangeof elements in all the intervening particles. The sub-ject of electro-decomposition will be further spokenof in connection with the electrotype. 28. The gas which is so plentifully disengagedat the surface of the platinum in this battery is apt tobring the strip into contact with the zinc, and thus SULPHATE OF COPPER BATTERIES. 19. cause a discharge between the metals within the bat-tery, instead of through the poles without. To obvi-ate this, the platinum is either confined in its properposition by some fixture at the bottom, or a bead ofglass is attached to it, which prevents its swingingagainst the zinc. Kg-. 10. ^S- ^^ ?^P^®- sents a series of three pairs of thisbattery, in whichit will be observedthat the platinumof one is connect-ed with the zincof the next, andthat the terminal wires proceed, consequently, onefrom a platinum plate and the other from a zincplate, as in a single pair. 29. Cylindrical Sulphate of Copper Battery.— This battery, a vertical section of which is rep-^^^ ^^ resented in Fig. 11, consists of a doublecylinder of copper, C C,with a bottom of thesame metal; which an-swers the purpose bothof a galvanic plate andof a vessel to containthe excit
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectmagnetism, bookyear18
