. Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy . rease in elimination of System. a. Relieve irritability. b. Induce soporific System. a. Induce diaphoresis. b. Induce diuresis, with increased elimination of general metabolism. Where a general sedative isindicated. Congestive head-ache. As a prelude to, or inconjunction with, otherstatic modalities. 33 CHAPTER III. GALVANIC, CONTINUOUS, OE DIEECT CUEEENT. Galvanism is named in honor of Galvani, a physician of Bologna,who in 1790 observed that convulsive seizures c
. Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy . rease in elimination of System. a. Relieve irritability. b. Induce soporific System. a. Induce diaphoresis. b. Induce diuresis, with increased elimination of general metabolism. Where a general sedative isindicated. Congestive head-ache. As a prelude to, or inconjunction with, otherstatic modalities. 33 CHAPTER III. GALVANIC, CONTINUOUS, OE DIEECT CUEEENT. Galvanism is named in honor of Galvani, a physician of Bologna,who in 1790 observed that convulsive seizures could be produced in thelimbs of a dead frog, when certain metals were made to touch the nerveand muscle simultaneously. The electrical theory of these motions, how-ever, originated with Yolta, and, deserving of the credit that his geniusgave to science, his name is inseparably linked with the subject ofgalvanism. Battery, A galvanic battery is a collection of two or more galvanic cells () so Connected that the electricity generated by all can be conducted J=>OL Pos/r/\^E. Fig. 23.—Galvanic cell. through a single wire. A cell consists of two dissimilar metals, one ofwhich is more readily acted upon by the electrolyte than the metals usually selected are zinc and copper. Such a cell is frequentlyreferred to a,s a galvanic couple. Connections. Upon joining the two metals with a wire an electrical circuit isformed. If a number of such simple cells are united in series, thezinc plate of one joined to the copper plate of the next, and so on, agreater difference of potential. will .be produced between the copperpole at one end of the series and the zinc pole at the other. 34 ; m DIRECT CURRENT. 35 Hence, wlieu two or more poles are connected by a wire, there will be agreater flow of electricity than would be generated by a single cell. Suchis the principle of the galvanic battery. The connection of zinc to copperthroughout the cells makes the latter in series. By
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