50-100
XX Building a Typical Prismatic Spotting or Observation Scope 255. XXI Additional Spotting and Observation Scope Designs 276. XXII The Selection of Telescopic Sights 291. XXIII Building Two Big-Game Scope Sights 325. XXIV Two Varmint Scopes and Five More Big-Game Scopes, of Which One Is of Variable Power 347. XXV Building a Target Scope 363 ................
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