Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . h is corroded, through the liquid Fig. 8. between them. This is shown inthe adjoining cut (Fig. 8), whichrepresents a glass vessel, nearlyfilled with the fluid, and contain-ing a zinc plate, marked Z, andone of copper, C. Now, the sup-posed motion of the electric cur-rent within the vessel, is from Zto G; and if the two metals areconnected by a wire without thevessel, as in the cut, in order tofulfil the condition of metalliccontact, the electricity i
Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . h is corroded, through the liquid Fig. 8. between them. This is shown inthe adjoining cut (Fig. 8), whichrepresents a glass vessel, nearlyfilled with the fluid, and contain-ing a zinc plate, marked Z, andone of copper, C. Now, the sup-posed motion of the electric cur-rent within the vessel, is from Zto G; and if the two metals areconnected by a wire without thevessel, as in the cut, in order tofulfil the condition of metalliccontact, the electricity is supposedto pass around through the wiresfrom the copper to the zinc again, to restore theequilibrium of the fluid. Thus the current is con-sidered as passing from zinc to copper within theseries, and from copper to zinc without it. Thewire connected with C is called the positive pole ofthe arrangement, and that with Z the negative The electricity proceeding from the positivepole is the same in its relations as the electricityfrom the prime conductor of the electrical machine,which originally received the name of positive; while. 10 DAVlS^S MANUAL, that from the negative pole corresponds with theelectricity obtained from the rubber of the terms are, however, to a certain extent, arbi-trary. It is still an open question, whether there isone fluid moving in a particular direction, or twofluids moving in opposite directions, or no motionof a fluid at all. The fact which is sought to beexplained by these theories remains fixed. In theabove-described circulation of the electrical fluid,technically called the galvanic circuit, there is anelectrical influence propagated in a certain unchan-ging direction; and as the control of the magneticand chemical reactions produced depends upon ourknowledge of this, it is necessary that the signi-fication of the terms should be understood. 18. Professor Faraday has proposed a nomencla-ture of electricity, which has been ad
Size: 1036px × 2412px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, booksubjectmagnetism, bookyear18
