A bifurcated arm 57 that is secured to one end of the pivot shaft 56 and extending downwardly will swing from side to side as {HEAD ~ the telescope} 55 is pivoted in a vertical plane about {TAIL ~ its pivot shaft} 56 
A bifurcated arm 57 that is secured to one end of the pivot shaft 56 and extending downwardly will swing from side to side as { HEAD ~ the telescope } 55 is pivoted in a vertical plane about { TAIL ~ its pivot shaft } 56
OTH 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 OTH REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH