CONTENTS. 



SECTION 11. 



GENERAL OBSERVATIONS ON THE WINDS, TIDES, AND 

 CURRENTS, AND ON THE DIFFERENT PASSAGES OVBB 

 THE NORTH ATLANTIC OCEAN. 



PAQB 



L— The WINDS 97 



1. General Eemarks, 97 ; Theories of Halley, Hadley, and others, oa 

 the Wind System, 98 — 101 ; Aqueous Vapour, 101 ; The Atmosphere, 

 and Proportions of Land and Water, 102 ; Force of the Wind, with 

 Tables of Force and Velocity, 103 — 106 ; Wind and Weather Nota- 

 tions, 103, 104 ; Land and Sea Breezes, &c., 106 — 107 ; Wind System 

 of the Northern Hemisphere, 107. 



2. The Motions and Pressure op the Atmosphere, 108 ; Use of the 

 Barometer, 108 ; Barometer Normals, &c., 108 — 111 ; Changes in 

 Atmospheric Pressure, 111; Buys-Ballot's Law, 112 — 113; Eemarka 

 by Captain Henry Toynbee, 113 — 116 ; Barometric Waves, 116 ; 

 Mr. W. R. Birt's Researches, 116 — 117 ; Barometric Gradients, 117 — 

 124; Methods of Foretelling Storms, 118—121 ; Remarks by Mr. Birt 

 on the Weather Charts of the Meteorological Office, 122 — 124. 



8. North Atlantic Winds and Weather, 124 ; Wind Regions of the 

 North Atlantic Ocean, 124 ; Wind and Weather Charts, &c., 125 ; 

 Monthly Forecasts, from the United States Pilot Charts, 126 — 128. 



4. The N.E. Tradh Wind, 128: Region, 128; Direction and Force of 

 the Trade Winds, 129 ; Mean Rates of Vessels, 129—131 ; Northern 

 Limit, 131 ; Equatorial Limit, 131 — 132 ; Table showing Equinoctial 

 Limits of the Trade Winds, 132; Direction and Duration of the 

 N.E. Trade Wind, 132—135; Maury's Summary, 135—136; Captain 

 Toynbee's Remarks on the Winds during each Month, in the region 

 between lat. 20° N. and 10° S., from long. 10° W. to 40° W., 136—140. 



Winds of the Atlantic Islands, 141 ; West Indies in general, 141 ; sA 

 Jamaica, 142 ; Bahama Islands, 144 ; the Bayainos, near Cuba, 144 ; 

 Guyana, Cumana, &o., 145 ; Gulf of Mexico, 146 ; the Norths, 146 — 

 150; Gulf of Mexico, North Coast, 150—152. 



5. Equatorial Calms and Winds, 152 ; Limits Defined, 152 — 153 ; 

 Table of Extent, 154; Captain Toynbee's Remarks, 155; Maury'a 

 Cloud- Ring and the Rains, 156. 



8. The African Monsoons, 157 ; Extent of the Monsoons, 157 — 158 ; 

 Winds and Seasons on the African Coast, by Captain Midgley, 158 — 

 160 ; Coast from Cape Blanco to Cape Palmas, 160 ; Windward 

 Coast, &c., 160 — 161 ; Remarks by Comm. Bourke, Baron Roussia, 

 and Lieut. Bold, 161—163; The Harmattan, 164—168. 



7. Winds and Calms on the Tropic, 168 ; at Bermuda, 169. 



