14 



CONTENTS. 



other — The Knights of the Black Hand — Unfavorable Symptoms — The Insu- 

 lation broken — The Third of August — An Anxious Moment — Land discovered 

 — Trinity Bay — Mr. Field visits the Telegraph Station — The Operators taken 

 by Surprise — Landing of the Cable — Impressive Ceremony — Captain Hudson 

 returns Thanks to Heaven — The Voyage of the Agamemnon — The Queen's 

 Message — The Sixteenth of August — Deep-Sea Telegraphing — The Equator 

 and the Cable 634 



CHAPTER LV. — Diving — The first diving-bell — Fixed apparatus supplied with 

 compressed air — The submarine hydrostat — Operations at Hell Gate — Diving 

 apparatus — Submarine explosions — Improved diving dresses — Their use — 

 Work of various kinds done with them — Instances of this — Seeking the treas- 

 ure of the Hussar — Sunken ships in Sebastopol — Operations in Mobile — The 

 dry-dock at Pensacola Bay — The beauties of the submarine world — Habits of 



the fish — Possible depth of descent 651 



CHAPTER LVI. — Fishing — The ocean as a field— The crops it yields— The 

 sponge — Transplanting sponges — Coral fisheries — The coral an animal — The 

 discovery of this — Oyster fishery — The oyster a social animal — The young 

 oyster — Oyster culture — Dredging for oysters — The American oyster fishery — 

 Pearl oysters — The value of the pearl fishery — Shark fishing — Cuttle fish 683 



CHAPTER LVII. — Dredging in modern times — What it has taught us — Deep- 

 sea soundings — First attempts — Implements used for it — The chance for in- 

 ventors — The temperature of the sea — Deep-sea temperature — Self-regulating 

 thermometers — Serial temperature soundings — Animal life of the sea — Deep- 

 sea dredging — The dredging apparatus of the Porcupine 716 



CHAPTER LVIIL— The development of ship building— New models for ships 

 — Steam ship navigation — Monitors — Iron-plated frigates — Tin-clads — Rams 

 — Torpedo boats — Their use in the Confederacy — Life rafts — Yacht building 

 — Ocean yacht race — The cost of a yacht 737 



CHAPTER LIX. — Our knowledge of the earth and sea — How it has increased 

 — The earth the daughter of the ocean — The opinion of science — The mean 

 depth of the ocean — The extent of the ocean — Its volume — Specific gravity 

 of sea-water — Constitution of salt-water — The silver in the sea — The waves 

 of the sea — The currents of the ocean — The tides — The aquarium — The com- 

 merce of modern times — The spread of peace 760 



