16 EFFECTIVENESS OF THE COMMITTEE ON OCEANOGRAPHY 



The specific gravity shall be represented in the tables by the formula £(70 V 



v 



The samples for the analysis of gas shall be collected every time in a pair of 

 sterilized vacuum tubes. 



It would be desirable for the existing tables on the absorption of nitrogen and 

 oxygen to be revised. 



VI 



Qualitative observations of plankton shall be made every six hours, passing the 

 water through a silk net for 15 minutes, and at the same time a sample of water 

 shall be collected (1 1 1(c)). 



At the points mentioned in Article II, samples for quantitative analysis shall be 

 collected at the different depths according to hydrographic conditions, using the 

 method of Professor Hensen. 



Petersen's modification for Hensen's net is recommended. 



The bacteriological institutions shall be given an opportunity to perform in- 

 vestigations in the ocean. 



VII 



Observations of currents and tides shall be made as frequently as circumstances 

 permit. 



The currents shall be examined, if possible, by linear direct meters and by the 

 float of wood on the surface and the intermediate waters, and by drift-bottles on 

 the bottom. 



The vessel shall be anchored occasionally in order to permit frequent observa- 

 tions during the period of high tide. 



VIII 



It would be desirable to make a map of the bottom of the sea in order to show 

 its nature. 



A description of the deposits should be made according to a definite plan to 

 be established later. 



IX 



Normal observations shall be made along the lines provisorily drawn on the 

 attached map where R signifies Russian, F Finnish, S Swedish, G German, Da 

 Danish, Du Dutch, N Norwegian, and B British lines in February, May, August 

 and November. Each participating country shall furnish, for this purpose, an 

 exploration vessel equipped for hydrographic and biologic research in the interest 

 of fishing. 



The plan for these periodic voyages is laid out in the following map: 



[The Map] 



Special points shall be decided by the respective countries, and once established' 

 subsequent observations shall be repeated there. 



The special instructions for the stations will be issued by the respective coun- 

 tries and the communications concerning the scope and nature of the observations 

 shall be made through the central bureau (see C (a) and (e)). 



For carrying out these researches it would be desirable to use motorized vessels 

 on regular routes, lightships, etc., and seacoast stations when it is necessary to 

 make observations on the temperature and to collect samples of sea water and 

 plankton. 



These observations shall be made not only during typical months but also in the 

 periods between. 



B. Biologic Work 



(a) The determination of the topographic and bathymetric distribution of the 

 spawn and larvae of useful sea fish, for instance, by quantitative methods such as 

 those of Hensen, with special reference to the most important species such as 

 plaice, codfish and haddock, herring, etc. 



