The de Watteville switch is placed directly above the pole changer is used for obtaining either the galvanic or the faradic current separately or the two combined. When the double lever rests on figure 1 and 3 the galvanic alone can be used; can when on 3 and 5 the faradic can be alone used and when on 2 and 4 the two currents are combined and used without changing the conducting cords.
THE FARADIC APPARATUS.
The Faradic apparatus of this cabinet combines a fast and slow interrupter also a single contact key. The style of coil used is the Du Bois-Raymond. To use Primary coil, place the two tips on ends of conducting cords into the two binding posts in front of the coil, the others being connected with any desired electrodes. The strength is increased by drawing the coil to the Right, first placing switch at right end of coil on button marked P.
To use the secondary coil remove the tips of cords from primary posts; then place the ends of cords in the two binding posts 13-13 and place switch on right end of coil on button marked S. To increase the strength of secondary, push coil to the Left gradually, which is just Opposite to what is done in case of primary current.
THE USE OF THE INTERRUPTER.
To use the rapid interrupter which works against the end of core it is only necessary to adjust the screw F, and any degree of vibration may be obtained. The same may be said of the slow interrupter which is adjusted by the screw D, but it is further controlled by the sliding weight at E. By sliding the weight up and down the interruptions are varied from very slow to rapid.
The higher the weight the slower the interruptions and vice-versa. At button G, is the “single contact” used in obtaining single impulse contractions.
The different interrupters may be placed in circuit by a switch on the base of the Cabinet which works over a series of buttons marked S, F and C which put in operation the slow, fast or single contact interrupters, as desired.
DIRECTIONS FOR CONNECTING CELLS.
Fill the cells according to the directions on the cell label, and connect the wires of the cable to the cells, as shown in the cut; No. O being attached to zinc of the first cell, No. 1 to the carbon of the first cell, while at the same time the carbon of the first cell connected to the zinc of the second cell by strip from the carbon of cell, No. 2 wire of the cable to the carbon of the second cell, and so on, the last wire being connected to the carbon of the last cell, as shown by No. 40. The two wires marked faradic should be connected as shown, the four cells being placed in two rows of two each, the zincs and carbons being connected together as shown in diagram.