A gauging device for measuring {HEAD ~ the accuracy} of the rate of taper of a tapered, arcuate brake block at a first measuring point and {TAIL ~ a second measuring point} comprising: 
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A gauging device for measuring { HEAD ~ the accuracy } of the rate of taper of a tapered , arcuate brake block at a first measuring point and { TAIL ~ a second measuring point } comprising :
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH