17 
5. Vilsund. The bottom-sample consisted of dark mud, with remains 
of Zostera, depth 14 meters. The carbon amounted to 2.07 9/,. 
6. Thisted Bredning, Sennels Church in N., 2 miles from land, depth 
81/, meters. The bottom-sample contained 1.017, C. 
T. Thisted Bredning; Hanklit' m"S:"W.-by"S., 17, miles: from land. 
The bottom-sample was characteristic for Thisted Bredning. The depth was 10 
meters. The sample contained 1.77 %, C and 01669%, N. The quotient 5—10.6. 
8. Thisted Bredning. Same place as sample 7. The uppermost, brown 
layer was scraped off and analysed. It contained 3.06 /, C, thus more organic 
material than the bottom-sample as a whole. 
9. Louns Bredning. The bottom in Louns Bredning consists of black, 
somewhat stinking mud. The bottom-sample was taken off Louns Church, N ”/, W, 
1'/, miles from land. Depth 6 meters. The sample contained 4.3 %, C and 
0.374, N. The quotient = == 11165 
10. Directly off Glyngøre. The bottom-sample was taken in the deep 
channel off Glyngøre at a depth of 21 meters. The bottom consists of black, 
stinking mud with many remains of Zostera. The sample contained 4.05 /, C. 
11. West of Furhoved. The bottom greatly resembled that in Thisted 
Bredning; it was quite without smell. The depth was 8 meters. The sample 
contained 2.24 %, C. 
12. Off Blødens Pæle (in the eastern part of the Limfjord in the 
neighbourhood of Hals). Depth 13 meters. The bottom consisted of black, 
stinking mud with a thin, brown layer, containing many living diatoms. The 
bottom-sample contained 17.12/, C and 0.138?/, N. The quotient S — 8.1. 
The following bottom-analyses came from the Isefjord. 
13. Roskilde Bredning. The bottom here is of quite a characteristic 
nature. It consists of a uniform, black, stinking mud, which quivers like a jelly. 
This layer of mud is very thick; a pole could lie inserted several meters down. 
Just as in Thisted Bredning a very thin, brown layer lies above the mud. When 
such a mud sample is dried, it shrinks considerably; it contained, when tested, 
no less than 85 /, of water (for the sake of comparison, it may be mentioned 
that a bottom-sample from clay bottom in the Kattegat contained ca. 62 %/, water). 
The bottom-sample which was taken at a depth of 3.5 meters, contained 10.2 ?/, 
C; this is the largest quantity of carbon I have ever obtained. On adding hydro- 
chloric acid to the bottom-sample, hydrogen sulphide was given off. We shall 
return later to this point. 
14. Isefjords large Bredning. The bottom here is much lighter than 
in Roskilde Bredning, with a-greenish yellow colour, but curiously enough it has 
the same quivering consistency as that in Roskilde Bredning, though somewhat 
less marked. The bottom-sample, which was taken at 9—10 meters depth, con- 
tained 2.27 7, C. 
15. Bramsnæsvig. The bottom is of similar nature to that in Roskilde 
Bredning, but not quite so black. It contained 8.6 /, C. 
Lastly, we have a few hottom-analyses from the Kattegat. 
16. Anholt; depth 34 meters. The bottom-sample consisted of fine clay 
3 
