The lateral position of {TAIL ~ the carriage}, accordingly, provides a visual indication of the tension in {HEAD ~ the test member} 
The lateral position of { TAIL ~ the carriage } , accordingly , provides a visual indication of the tension in { HEAD ~ the test member }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD