Reprint of 1900 Percival Marshall book explaining complete instructions for making electrical timepieces, synchronized clock systems, and chiming mechanisms. Chapters on various types of electric clocks, how to produce a seconds pendulum clock, using inexpensive materials, converting a grandfather clock to impulse drive, the sychronome system, and a master chiming gear for 1/2 minute electrical time circuits. Generously illustrated. Soft cover. 159 pages.