APPENDIX II 901 



Catalogue of Admiralty Charts, Plans, and Sailing 

 Directions, 1920. (Revised annually.) London: Wym.m 

 and Sons. 



Reports of Voyages of Exploring Vessels, etc. 



"Three Cruises of the Blake," by Alexander 

 Bulletin Mus. Comp. ZooL, vol. xiv. Cambridge, M 

 U.S.A. 1888. 



Challenger Reports : " Narrative of the Cruise, Deep-Sea 

 Deposits, Oceanic Circulation, and Summary of Results." 

 1885-1895. 



Report on Norwegian Fishery and Marine Investigations. 

 Helland-Hansen and Nansen. Bergen. 1909. 



There are, of course, many others. The above serve as 

 useful types for an introduction to the subject. 



The Challenger Society (Secretary, Mr. Tate Regan, 

 F.R.S., Natural History Museum, South Kensington, 

 London, S.W.) publishes charts and books of interest to 

 oceanographers . 



Tides. 



In many respects this is the most difficult branch of the 

 subject. For the beginner a consideration of the simpler 

 phenomena is sufficient. Further information may be 

 sought in 



Airy: "On Tides and Waves," in the Encyclopedia 

 Metropolitana, vol. v. London, 1842. (The treatment is 

 mathematical.) 



Rollin A. Harris : " Manual of the Tides." U.S. Coast 

 and Geodetic Survey. (A voluminous work.) 



W. H. Wheeler: "A Practical Manual of Tides and 

 Waves." London, 1906. 



Biology of the Sea. 



"Conditions of Life in the Sea," by J. Johnstone. 

 Cambridge Biological Series. 1908. 



