Separate stadia are provided with the reticle, allowing the marksman to gauge the angle subtended by an object of known size to determine {HEAD ~ the apparent distance} to {TAIL ~ the target} 
to
Separate stadia are provided with the reticle , allowing the marksman to gauge the angle subtended by an object of known size to determine { HEAD ~ the apparent distance } to { TAIL ~ the target }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL