FIG. 19.-MAIN SWITCHBOARD SIDE VIEW WITH GRILLE WORK REMOVED.

FIG. 20.-MAIN SWITCHBOARD VIEW OF INTERIOR SHOWING INTERLOCKS AND OIL SWITCHES.

FIG. 21.-MAIN SWITCH BOARD-FRONT VIEW WITH PANELS REMOVED.

FIG. 22.-MAIN SWITCHBOARD-PARTIAL FRONT VIEW SHOWING PRINCIPAL CONTROL LEVERS.