COUNCIL - MARCH 1920 - REPORT — 50 — 



II. Meeting of Hydrographical Section. 



First sitting, Wednesday, 3rd March, 1920. 



Dr. Jee in the Chair. 



The British hydrographical proposals were accepted as the basis for dis- 

 cussion. See Appendix I, p. 64. 



Plaice Programme. 



1. Prof. VAN EvERDiNGEN Stated that in his opinion tew drift bottles were 

 required on the hne from Swarte Bank to Haaks owing to the indeterminate drift 

 of the water in this area, and suggested the liberation of larger numbers more to 

 the South and on the Flamboro-off Grounds respectively. He accepted the recom- 

 mendation that drift bottles, supplied by Great Britain, should be put out through- 

 out the year at North Hinder and Terschelhng L. V. but suggested that the weekly 

 hberation of 10 bottom and 25 surface drifters would give satisfactory information. 

 They should be accompanied by regular meteorological observations which should 

 include log and wind observations for surface water drift every four hours starting" 

 at midnight. These log and wind observations should also be taken at all possible 

 Lightships throughout the year in question. These proposals were agreed to. 



Professor Knudsen stated that owing to the commitments of Denmark in car- 

 rying out Research in the North Atlantic Ocean, it would only be possible to sup- 

 port practically the British programme with observations at the Horns Riff Light- 

 ship. 



Professor Pettersson suggested that the British Research Ship should 

 endeavour to make a study of Hydrogen Ion concentration and Oxygen Content 

 at various depths and positions; but only in the two months of maximal spawning. 

 This suggestion was approved, and Holland was also invited to carry out similar 

 observations at Helder, daily if possible, throughout the year. 



With these amendments the Hydrographical section approved the British 

 hydrographical proposals. 



Surface Observations. 



2. It was recommended that surface salinity and temperature observations 

 should be collected on the following routeff: — 



By Denmark between (1) Esbjerg and Harwich. 



(2) Copenhagen and New York. 



(3) Copenhagen, Iceland and Greenland. 

 By Finland between Helsingfors and Hull. 



By Holland between (1) Flushing and Folkestone. 



(2) Rotterdam and London. 



(3) Amsterdam and Hull. 



