13 



En nærmere Berørelse med Eavbunden og ilens dy- 

 riske Liv har altsaa ingen mærkbar [ndflydelse paa Havets 

 Sammensætning med Hensyn til disse Bestanddele. INlid- 

 deltallene for Svovlsyre viser større Mvigelser end tie til- 

 svarende for Magnesia, skjøret man skulde have ventet, at 

 det Modsatte havde fundetSted. ForskjeUighederne er dpg 

 i dette Tilfælde ligesom i de foregaaende for ubetydelige 

 til at kunne afgive noget bestemt Bevis for, at der virkelig 

 existerer nogen tilsvarende Eiéridommelighed i Havet. At 

 Svovlsyregehalten i tie mellernliggende 'Dyb skulde være 

 høiere end ved Bunden og Overdåden, er en Antagelse, 

 der a priori ikke har nogen Sandsynlighed for sig. 



Jeg kommer senere muligens tilbage til disse Spørgs- 

 maal angåaende Havets Beskaffenhed i Dybet, da jeg for 

 Øieblikket er ifærd med at undersøge de Prover, som un- 

 der Expeditionens Dybdemaalinger optoges af Havbunden. 

 Etter de foreløbige Resultater i denne Retning anser jeg 

 mig imidlertid berettiget til at antage, at dette Dybvands- 

 slam er af en temmelig ensartet Beskaffenhed. 



Foråt betragte de her foreliggende Bestemmelser fra 

 et andet Synspunkt, har jeg i etterfølgende Tabel ordnet 

 Middel- og Forholdstallene for Søvandets Bestanddele etter 

 de Breddegrader, niellem hvilke Vandprøverne er optagne. 



Hence, close proximity fco the bottom and fche ani- 

 mal Life prevailing there, is found to have no appreciable 

 influence on the composition of ocean-water. — as regards, 

 at least. this divisjon of its constituents. The mean valnes 

 for sulphuric acid exhibit greater variation than the figurés 

 computed for magnesia, though there w as reason to expect 

 the reverse. But here also. as in the case previously 

 noticed. the differences are much too small to -admit of 

 tlieir furnishing conclusive proof of some corrésponding pecu- 

 liaritv actually distinguishing the water of the ocean. Thai 

 the proportion of sulphuric acid should be greater at'inter- 

 mediate depths than at the bottom and the surtace. is. 

 reasoning a priori, an improbable assumption. 



Possibly 1 sliall have occasion. to resume the discus- 

 sion ut' questions relating to the composition of the ocean 

 at great depths, being at present engaged on the examiua- 

 tion of* the samples of the bottom brought up on the Ex- 

 jieditiim when deep-sea soundings were tåken. Judging 

 from the first results in that direction, this deep-sea ooze 

 would appear to be comparatively uniform in composition. 



With the object of presenting the determinations here 

 described from another point of view, I have. in the fol- 

 lowing Table, arranged the mean and proportipnal values 

 of the constituent parts of the sea-water according to the 

 parallels of latitude within which the samples of bottom- 

 water were collected. 



80" 



71"— 66" 66" — 62" 



80" 



-66" 66"— '62" 



Middeltal for Ol 1.929 



- Egenvægt 1.0264. 



- CaO ........ 0.0580 



- MgO 0.2 1 go 



- SO3 '. 0.2208 



CaO: Cl (Cl = 10<>) 3.01 



MgO: Cl 11.35 



SO,: Cl .1.45 



CaO : SM, (SO,- 100) 26.27 



MgO:S0 3 qq.18 



Mean Valne Chlorine 1 1.929 



Specitic Gravity . . 1.0264 



.. CaO 0.0580 



MgO . ■ 1 0.2190. 



„ •• SO, 0.2208 



CaO: Cl (Cl =100) '. 3.01 



MgO: Cl 11.35 



SO,: Cl 11.45 



CaO: SO, (SO s = 100) 26.27 



MgO: S0 3 99.18 



Middeltallene for Kalkmængden viser i denne Tabel 

 den samme TJforanderlighed som i den foregaaende. For- 

 skjellighederne ved Magnesia er derimbd større, men i Be- 

 . tragtning af Analysens mindre Sikkerhed berettiger de ikke 

 til nogen Slutning med Hensyn til et tilsvarende Forhold 

 i Havet. Svovlsyren har sit Maxinmm søndenfor den nord. 

 lige Polarkreds. hvor Middeltallet er 0.2223 pCt. Våndets 

 høiere Egenvægt i denne Del af Havet staår maaske i Sam- 

 klang med denne Forøgelsé af Svovlsyremængden. . skjønt 

 man ved Sammenligning med Forchhammers Analyser af 

 nærliggende Vandprøver, bvøraf ingen er hentede nordenfor 

 den 62de Breddegrad, skulde tro. at Havet virkelig i disse 

 sydligere Egne var i Besiddelse af en større Svovlsyrege- 

 halt. Forchhammer tinder nemlig som Middeltal for Svovl- 

 syren melleih den 60de og 62de Breddegrad 0.230 pCt. 

 Men efter al Rimelighed skriver denne Uoverensstemmelse 



The mean values here computed for lime exhibit the 

 same uniformity as those in the preceding Table, whereas 

 the differences in the proportion of magnesia are greater. 

 But. if regard be bad to the fact. that the analyses from 

 which they were deduced are to a certain extent defective. 

 their results. though comparatively incongruous. will not war- 

 rant infefring a similar peculiarity in the water of the ocean. 

 The amount of sulphuric acid reaches its maxinmm south of the 

 Arctic Circle, vvhere the mean amount is 0.2223 per cent. 

 The greater specitic gravity of the water in this fcract of 

 the ocean may possibly be connected with this increase in 

 the proportion of sulphuric acid. though a comparison with 

 Forchhammers analyses of samples collected in adjacent 

 localities. none of which, however. lav north of the 62nd 

 parallel of latitude, would seem to favour the assumption, 

 that the ocean, in those southern regions, does really con- 



