An insulating surface covers {TAIL ~ the magnet} and {HEAD ~ a conductive liquid} is disposed in a channel defined by the insulating surface and the lower case sidewalls 
An insulating surface covers { TAIL ~ the magnet } and { HEAD ~ a conductive liquid } is disposed in a channel defined by the insulating surface and the lower case sidewalls
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH