21 



Man taar nemlig af Observationerne 

 delværdier: 



følgende Mid- 



as will be MTii from the following Table' showing th 

 meau values. 



Naar den midlere Kvælstofmængde her i de dybere 

 Lag er funden noget lavere end man skulde vente, da har 

 dette sin Grund i. at der ved de 5 Observationer No. 17. 

 22. 33. 36 og 37. alle hidrørende fra Va ildprøver fra det 

 i 1877 undersøgte Strøg, er fondet en ca. 1.5 CC. lavere 

 Gehalt, end de ved sin Temperatur vikle kunne optage 

 ved almindeligt Atmosphæretryk. Forresten vil efter alle 

 de øvrige ( )bservationer at dømme ogsaa i de større Dyb 

 Kvælstofmængden tindes at, stemme overens med den af 

 Formelen beregnede. 



En lignende Sammenligning 1 er af Buchanan gjort 

 mellem de af ham for de sydlige Have fundne Tal og de 

 af Bunsen for destillere! Vand opstillede. Her optræder 

 ved denne Sammenligning især ved de lavere Temperaturer 

 ikke ubetydelige Differentser paa lige op til over 1 CC. 

 pr. Litre. men disse vil ved Sammenligning med de efter 

 Forfatterens Formel beregnede Tal saa godt som bortfalde, 

 idet man faar : 



Det fremgaar heraf. at Kvælstofmængden, saaledes 

 som det allerede af Ur. Jacobsen og Andre er antaget, 

 ikke i mindste Maade retter sig efter de i de store Dyb 

 herskende Tryk men kun afhænger af Temperaturen. Den 

 eneste rimelige Fortolkning udelukker Muligheden for. at 

 Tryk- oe; Temperaturdifferentser i de under Overdåden 



The mean quantity of nitrogen in the deeper strata 

 proved, accordingly, somewhat lower than there was reason 

 to expect: hut this arose from the proportion determined 

 by 5 of the observations, viz. Nos. 17. 22. 33. 36. and 

 37 - all of them referring to samples of water obtained 

 from the tract of ocean investigated in 1S77 — ha ving 

 been about l.r> ,v less than could he absorbed at the 

 same temperature under ordinarv atmospheric pressure. 

 For the rest. judging from all the other observations, the 

 proportion of nitrogen observed, even at greater depths. 

 will be found to agree with that computed by the formula, 



A similar comparison 1 was instituted by Buchanan 

 between liis results for the water of the Southern Seas 

 and the figures found by Bunsen for distilled water. The 

 differences resulting from this comparison. more especially 

 for a low temperature, are considerable. the greatest reach- 

 ing 1« per litre; but, on comparing them with the figures 

 given by the a uthors formula. tliey will be found almost 

 to vanish, as appears from the following Table. 



Hence the amount of nitrogen, as previously assumed 

 by Dr. Jacobsen and .others. can in no wise be affected 

 by the increase of pressure at great depths. but must ob- 

 viously be dependent on temperature alone. The results 

 of these observations exclude. therefore, the possibility of 

 differences in temperature and pressure at depths below 



Ber. Berl. cheiri. < res, 



I 1 



410. 



1 Ber. Deri. chem. < res. 11, p. 410. 



