CONTENTS 3d 



CHAPTER XIV 

 Telegraphic — Chronometrio. 



PAGE 



Meridian Distances -...-.. 326 



CHAPTER XV 

 True Bearing - . - - - - - -351 



By Theodolite — By Sextant — Variation. 



CHAPTER XVI 

 Sea Observations ....... 364 



Double Altitude — Sumner's Method — New Navigation — Short 

 Equal Altitude — Circum-meridian Altitudes of Sim. 



CHAPTER XVII 

 The Completed Chart - - . . - - 373 



Fair Chart — Reducing Plans — Reducing Plans by Photography — 

 Delineation — Symbols — Colouring — Graduation. 



CHAPTER XVIII 

 Deep-Sea Soundings ....... 391 



Wire Sounding — Dredging — Nature of Ocean Bottom — Submarine 

 Sentry. 



CHAPTER XIX 



MiSCELLANEOtTS ..--.-.. 409 



Distortion of Printed Charts — Sailing Directions — Observations on 

 Under-Currents — Pillsbury Current Meter — Exploring a Riv^er 

 — Swinging Ship. 



CHAPTER XX 



Supplemental - - - - . . . . 422 



Simplified Method of Ship Sounding — Roller Soimding — Sounding 

 Traveller — Sweeping — Vacuum Tide-Gauge — Tidal Observa- 

 tions from Ship at Anchor — Plotting — Fixing Positions — 

 Rectangular Co-ordinates — Recent Developments. 



CHAPTER XXI 

 TB.IANGULAT10N BY Means of Floating Moored Beacoks - . 472 



