The carriage will move relative to a scale provided on the frame, such movement being commensurate with {HEAD ~ the amount} of deflection of the elongated flexible member caused by {TAIL ~ the known spring force} 
caused by
The carriage will move relative to a scale provided on the frame , such movement being commensurate with { HEAD ~ the amount } of deflection of the elongated flexible member caused by { TAIL ~ the known spring force }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL