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. * * * * * Transcriber’s Notes: Footnotes have been moved to the end of each chapter and relabeled consecutively through the document. Illustrations have been moved to paragraph breaks near where they are mentioned. References in the text to illustrations have been standardized. Sidenotes originally appearing near the start of a paragraph are positioned at the beginning of the paragraph; sidenotes in the middle of long paragraphs are positioned near the relevant sentences. Punctuation has been made consistent. Variations in spelling and hyphenation were retained as they appear in the original publication, except that obvious typographical errors have been corrected. End of the Project Gutenberg EBook of How to Use a Galvanic Battery in Medicine and Surgery, by Herbert Tibbits