CONTENTS. x^i 



909. — An immense Current, 911. — Tide Rips, 914. — Pulse of the Sea, 920. 



Diurnal Change of Sea Temperature, 922. — The Fisheries, 925. — The Sperm 

 Whale, 926 Page 308 



CHAPTER XVII. 



STORMS. 



Data for Plate V., ^ 929.— Typhoons, 936.— Monsoons in the China Sea, 937.— Mau- 

 ritius Hurricanes, 938. — West India, ditto, 939. — Jansen on Hurricanes and Cy- 

 clones, 940. — Extra-tropical Gales, 950. — The Steamer San Francisco's Gale, 951. 

 — More Rains, Gales, &c., in the North than in the South Atlantic (Plate 

 Xni.), 956 326 



CHAPTER XVIII. 



ROUTES. 



How Passages have been shortened, ^ 959. — How closely Vessels follow each other's 

 Track, 961. — The Archer and the Flying Cloud, 962. — The great Race-course upon 

 the Ocean, 964 — Description of a Ship-race, 966. — Present Knowledge of the 

 Winds enables the Navigator to compute his Detour, 991 336 



CHAPTER XIX. 



A LAST WORD. 



Brussels Conference, § 996. — How Navigators may obtain a Set of the Maury Charts, 

 997.— The Abstract Log, 998 345 



Addenda 349 



