viii DEPTHS OF THE OCEAN 



Professor Carl Chun, Leipzig ; 

 Mr. C. Dons, Tromso ; 

 Dr. P. P. C. Hoek, Haarlem ; 

 Dr. O. Nordgaard, Trondhjem ; 

 Professor G. O. Sars, Christiania ; 

 Professor R. Woltereck, Leipzig. 



Sir John Murray's secretary, Mr. James Chumley, has 

 given us most valuable assistance by correcting the English 

 manuscript and taking care of all printing arrangements. Sir 

 John Murray wishes also to acknowledge the co-operation of 

 Dr. Caspari and the other assistants in the " Challenger " office 

 in correcting proofs and preparing the indexes of this book. 



The authorities of the Bergen Museum have undertaken to 

 publish a detailed account of the voyage and of the physical and 

 biological observations, in a series of quarto volumes which 

 will be issued from the press at intervals during the next few 

 years. These more detailed reports will undoubtedly form 

 valuable contributions to the science of oceanography. I 

 hope also that this general account will be of use to those 

 engaged in the study of oceanography, and that it may lead to 

 further investigations in the North Atlantic — that wonderful 

 ocean bordered by nearly all the seafaring countries. As will be 

 seen from several of the following chapters. Sir John Murray's 

 well-known scientific views and his original ideas have been of 

 great value to this expedition. I wish therefore to express my 

 indebtedness to Sir John Murray, not only for the opportunity 

 of engaging in this interesting Atlantic cruise, but also for 

 his kindness in giving the benefit of his great experience to 

 the advancement of the undertaking. 



JOHAN HJORT. 



Bergen, February 19 12. 



