The Book of the Sextant, with Ancient and Modern Instruments of Navigation

63 pp. Includes black-and-white illustrations. CONTENTS: The Astrolabe; Gunter's Quadrant; The Nocturnal; Cross Staff or Fore Staff; The Back Staff; Principles of the Sextant; Construction of the Sextant; Astronomical Telescopes; Adjustment of the Sextant; Unadjustable Errors of the Sextant in the Examination of "Sextant Errors"; Method of Using the Sextant; To Resilver the Index and Horizon Mirrors; Sextant Accessories; The Artificial Horizon; The Paget Artificial Horizon for Attaching to the Sextant and Use in a Sea-Way; The Gyroscope Collimator Invented by Admiral Fleurais; The Quintant; Sounding Sextant; The Night Octant; Angle Sextant; The Double Sextant; The Navigraph; The Goniograph; Reflecting Circles; The Dip Sector; The Station Pointer; Star Globe.