CONTENTS. XV 
The Dredger’s Note-book.—The Dredging Committee of the British 
~ Association.— Dredging on the Coast of Britain.—Dredging abroad.— 
History of the Progress of Knowledge of the Abvssal Fauna. Page 236 
= 
AppEnDIx A.—One of the Dredging Papers issued by the British Associa- 
tion Committee, filled up by Mr. MacAndrew.... ... .... Page 281 
CHAPTER VII. 
DEEP-SEA TEMPERATURES. 
Ocean Currents and their general Effects on Climate.—Determination of 
Surface Temperatures.—Deep-sea Thermometers.—The ordinary Self- 
registering Thermometer on Six’s principle-—The Miller-Casella modifi- 
cation. —The Temperature Observations taken during the Three Cruises 
of H.M.S. ‘ Porcupine’ in the year 1869, ete. cee roca ers Ueege. 284 
AppENDIx A.—Surface Temperatures observed on board H.M.S. ‘ Porcupine’ 
during the Summers of 1869 and 1870 ... ... ... ... ..- Page 329 
AvpenDIx B,—Teimperature of the Sea at different Depths near the Eastern 
Margin of the North Atlantic Basin, as ascertained by Serial and by 
Bottom Soundings... ... : 22s as “ave « Ge sae 
Appenpix C.—Comparative Rates oF edncuion of Temperature w a 
Increase of Depth at Three Stations in different Latitudes, all of them 
on the Eastern Margin of the Atlantic Basm ... ... ... Page 353 
AppENDIx D.—-Temperature of the Sea at different Depths in the Warm and 
Cold Areas lying between the North of Scotland, the Shetland Islands, 
and the Fieroe Islands ; as ascertained by Serial and by Bottom Sound- 
ings. Sid iszd,, Soe | evo e 
APPENDIX E. Bete mediate Bottom Menem cnr: show ing the Intermixture 
of Warm and Cold Currents on the Borders of the Warm and Cold 
PATCAS Tones cree. Gree. hcl ie en hee a ges OO 
CHAPTER VIII. 
THE GULF-STREAM. 
The Range of the ‘ Porcupine’ Temperature Observations.— Low Tempera- 
tures universal at great Depths.—The Difficulty of investigating Ocean 
Currents.—The Doctrine of a general Oceanic Circulation advocated by 
Captain Maury and by Dr, Carpenter.—Opinion expressed by Sir John 
Herschel.—The Origin and Extension of the Gulf-stream.—The Views of 
Captain Maury; of Professor Buff; of Dr. Carpenter.— The Gulf-stream 
off the Coast of North America.—Professor Bache’s ‘ Sections. —The 
Gulf-stream traced by the Surface Temperatures of the North Atlantic.— 
(Mr. Findlay’s Views.—Dr. Petermann’s Temperature Charts.—Sources of 
