. A treatise on electrolysis and its applications to therapeutical and surgical treatment in disease . wo zincs (B), and twocoppers, or carbons, of every two cells and then by connecting the zincsof each group of two cells to the copper, or carbon, of the next group inline; or we may arrange them in groups of three cells (C), or of any de-sired number. The third system is that in which all the zincs are unitedtogether in parallel, all the coppers together, and is the usual method forproducing the heat current for thermocautery, because we may in this RESISTANCE \M> DIFFUSION OF ELECTEICITT.
. A treatise on electrolysis and its applications to therapeutical and surgical treatment in disease . wo zincs (B), and twocoppers, or carbons, of every two cells and then by connecting the zincsof each group of two cells to the copper, or carbon, of the next group inline; or we may arrange them in groups of three cells (C), or of any de-sired number. The third system is that in which all the zincs are unitedtogether in parallel, all the coppers together, and is the usual method forproducing the heat current for thermocautery, because we may in this RESISTANCE \M> DIFFUSION OF ELECTEICITT. 85 way reduce the Internal resistance to its smallest amount, and so obtainthe full current strength of a giveu form of battery (D). We may, also,arrange bo that we may decrease the tension and at the same time increasethe effective quantity in a given circuit: for instance, we may use in com-bination two of these arrangements, one of which is coupled * for quan-tity and the other for tension; and we may thus arrange for a quantityof ten cells with a tension of six, or of any desired Fig. 11. It is, oftentimes, desirable to use a current which may be nicely grad-uated to increase, or diminish, the original electromotive force, at thepleasure of the operator. The principle of the laws of resistance, as abovedescribed, may be mechanically arranged, so that we may place more orless resistance in the circuit. It can, of course, be seen, if these princi-ples have been properly explained and correctly understood, that it willmake no difference in what part of the circuit Ave may interpose the re-sistance, because its obstructing effect will be manifested in every partof the circuit. One of the earliest and simplest mechanical forms of resistance coil, orRheostat (flow-arrester), is that which was invented by Wheatstone (illus-trated in Fig. 12). >In this instrument a longer or shorter piece of wire, made of a feeble?Ganots Physics, 1869, i>. 817. 8(3 ELECTROLYSIS
Size: 1298px × 1925px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookidtreatiseonelectr00amorric
