26 



Ved Lodskuddene søges bestemt Bankernes Form og 

 Udstrækning, samt den Maade, paa hvilken Bunden falder 

 af fra disse til de største Dybder i Ishavsdybet. Det er 

 af fundamental Betydning for Forstaaelsen af Havets og 

 de tilgrændsende Landes orografiske og geologiske Forhold, 

 ligesom for Dyrelivets Udbredelsesforhold, at faa afgjort, 

 om Bunden falder jevnt af mod Dybet, eller om den falder 

 af i Trin, Terrasser eller Afsatser med mellemliggende 

 Plateauer. Lodskuddenes Plads og Antal bestemmes der- 

 for med disse Hensyn for Øje. 



Maalingerne af Havets Temperatur i Dybet udfores 

 i den Udstrækning, som er nødvendig til en sikker Bestem- 

 melse af Dy bets Isothermer i de efter denne Plan opgaa- 

 ede Tversnit. Der tåges Hensyn til det hensigtsmæssige i, 

 at Punkterne i Tversnittene ogsaa kunne anvendes til 

 Længdesnit. De nyeste Dybvandsthermometre anvendes saa 

 ofte som muligt ved Siden af det ifjor brugte. 



Ved hvert Lodskud tåges Vandprove fra Dybet og 

 paa udvalgte Steder fra intermediære Dybder. Alle Vand- 

 prøvers specifiske Vægt bestemmes. 



Ved hvert Lodskud tåges Bundprover. der opbevares 

 til videre Undersøgelse. Af de med de zoologiske Fangst- 

 apparater optagne' og sigtede Materiale af Havbunden tåges 

 Prøver til Opbevarelse. 



De chemiske Arbejder udfores væsentlig som ifjor. 

 Den specihske Vægt af Havoverfladens Vand bestemmes en 

 til to Gange daglig, og oftere paa Steder, hvor Strømfor- 

 hold eller andre Forhold gjøre det onskeligt. 



Iagttagelsen af . Strømmen i Havet søges udført. naar 

 Naturforholdene gjøre det ønskeligt og Vejrforholdene muligt. 



Magnetiske Dbservatipner søges udført ombord i Soen. 

 navnlig lægges Vægt paa Erholdelsen af Misvisningsobser- 

 vationer. Absolute Bestemmelser søges udført paa Køst og 

 paa Grønlandsisen, fortiden ved Bestemmelsen af Skibets 

 magnetiske Constanter i Husø. og desuden. hvor Lejlighe- 

 den ellers maatte findes, som i Bergen. Boda. Tromsø ta. H. 



Geologiske Undersøgelser foretages paa Jan Mayen, 

 om Landgang der er mulig, i al den Udstrækning. som 

 Forholdene tillade. Paa Jan Mayen vil astronomisk-geo- 

 grafiske Stedbestemmelser, topografiske og hydi'ografiske Un- 

 dersøgelser være af største Interesse at faa udført. En 

 Stedbestemmelse paa Røst - i Forbindelse med de mag- 

 netiske Observationer — vil yære ønskelig, da Stedet ikke 

 er forbundet med det trigonometriske Net. 



imens; and at the Greenland ice-barrier there might, per- 

 haps. be opportunity of capturing a few seals, with an 



occasional shot at a Polar bear. 



Deep-sea soundings will be tåken to determine the 

 contour and extent of the coastal banks, as also their 

 slope. or bow the bottom shelves down into the greatest 

 depths of the Arctic Ocean. It is a porat of funda- 

 mental importance in studying the orographical and geo- 

 logical conditkms of the sea and the eountries it surrounds. 

 and the distributiori of animal lite in the ocean, to tind whether 

 the bottom slopes gradually down to the depths. or descends, 

 as it were. step by step, in terraces. with interjacent pla- 

 teaus. Hence. the position and number of the soundings 

 will have to be determined with this object in view. 



The temperature of the sea will be tåken to the ex- 

 tent required for an indisputable determination of the 

 isotherms of the transverse sections explored in accordance 

 with the present scheme. Attention is directed to the 

 position of the observing points in the transverse sections, 

 which should admit of their being applied to longitudinal 

 sections. Whenever practicable. the temperature shall be 

 registered with the latest deep-sea thermometers as well as 

 with the instrument used on last year's cruise. 



With every sounding, a. sample of water shall be 

 brought up from the bottom, and in specially selected 

 localities also from intermediate depths. All the samples 

 to have their specific gravity determined. 



With every sounding. a sample of the bottom shall 

 be obtained, and preserved for subsequent examination. 

 Samples of the sifted material brought up from the bed of 

 the ocean with the dredge or trawl will also be preserved. 



In the chemical work there will be no essential change. 

 The specific gravity of the surface-water shall be registered 

 once or twice a day. and more frequently in localities 

 where the action of currents or other exceptional condi- 

 tions may render it desirable. 



Observations on ocean-currents will be made whereso- 

 ever the attendant physical conditions may render them 

 desirable and the state of the weather practicable. 



Magnetical observations shall. if possible, be tåken at 

 sea. especial stress being laid on obtaining determinations 

 of the variation of the compass. Absolute determinations 

 shall. if possible. be performed at Røst and on the Green- 

 land ice. exclusive of those for the sbip's magnetic con- 

 stants to be made at Huso ; and wheresoever else oppor- 

 tunity may be afforded, as at Bergen, Bodø. Tromsø etc. 

 and other places. 



Geological investigations will be undertaken on the 

 island of .lan Mayen, should the Expedition succeed in 

 landing there. Peculiar interest would likewise attach to 

 astrdnomical determinations of latitude and longitude, as 

 also to topographical and hydrographica] observations made 

 on tljat island. ln connexion with the magnetical observa- 

 tions instituted at Rost, it will be desirable to perform 

 determinations ol latitude and longitude, that locality not 

 being included in the trignometrical net of the country. 



