— 47 — 



B. Other work of the Bureau. 

 Report of Work Carried out by the Departments of the Bureau during 1921 — 22. 



a. Hydrographical Department. 



1. The Department took care of the final redaction and the printing of the "Bulletin 

 Hydrographique", mer du nord, 1905 — 1914. 



2. Dr. Gehrke continued and finished his working up of the material to his "Pu- 

 blication de circonstance" about the ice-winters. The printing of this paper 

 is now going on. 



3. Professor Knudsen has worked out a treatise "On measurements of the pene- 

 tration of light into the sea" and another treatise "Some new oceanographical 

 instruments." These are proposed to be published as "Publications de circon- 

 stance." 



4. The department has acted as an adviser on scientific and technical problems 

 raised by oceanographers in various countries. 



5. The department has corresponded with the different participating hydro- 

 graphers about the hydrographical material for the next issue of the "Bulletin" 

 in accordance with the regulations laid down in the programme of the Council. 



b. Statistical Department. 



During the year 1921—22 the "Bulletin Statistique" for the years 1914—18 

 (the war years) is printed and was distributed the 1st of August 1922 to the various 

 countries. The work with the next "Bulletin Statistique" for the years 1919 — 21 

 is commenced and finished with respect to some of the countries. 



The library, belonging to the Bureau, has been catalogued and is now kept 

 up to date. 



c. Plankton Department. 



The editor for the Plankton questions has during the financial year assisted 

 the General Secretary in matters concerning plankton. 



No plankton reports have been sent to the Bureau for printing. 



The exact specification of the standard net recommended by the Plankton 

 Section at the meeting of July 1921 (Proc. Verb. XXVII, p. 36) has not yet been 

 forwarded to the Bureau and 'bonsequently no circular has been sent out. 



III. Work of the Participating Countries in accordance witli the Programme 



of the Council. 



A. General observations. 



Belgium. Owing to lack of a research ship and of a laboratory and haAdng 

 had at disposal very few naturalists only Belgium has not been in a position to 



