In {TAIL ~ a preferred embodiment}, the control circuit is for controlling current through {HEAD ~ a resistive load}, for example, a furnace coil 
In { TAIL ~ a preferred embodiment } , the control circuit is for controlling current through { HEAD ~ a resistive load } , for example , a furnace coil
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH