1746 Cullen, who had obtained similar results.

4-49 Controls ................................. 4-50 COMMUNICATIONS AND TRACKING OISPLAYS AND CONTROLS BREAKDOWN Display or control Quantity Toggle switches 827 Circuit breakers 430 Pushbutton switches 415 Rotary switches §3 Thumbwheel switches 29 Timers 4 Vernier potentiometers 97 Rotational hand controller.—The.