Survey of Northeast Greenland. 427 
LIX from 11—12/VI 19087), the series of temperature of which are 
as follows: 
Series LVI, 28/V 08, lat. 76°51’ М, long. 19°51’ W. 
Depth, Temperature Freezing point 
metres temperature 
2 — 1.72 + 1.74 
25 + 1.65 + 1.75 
50 + 1.69 + 1.77 
75 — 1.70 + 1.78 
100 -- 1.61 — 1.80 
125 + 1.39 
150 —<+- 1.19 
180 + 1.08 
215 + 1.02 
Series LIX, 11—12/VI 08, lat. 76°46’ N, long. 19°00’ W. 
185 — 1.74 — 1.75 
25 + 1.72 — 1.76 
50 = 1.72 ‚=-177 
15 — 1.71 — 1.78 
100 + 1.63 + 1.80 
125 — 1.62 + 1.80 
150 + 1.62 + 1.81 
175 + 1.61 + 1.82 
200 —- 1.60 — 1.82 
It will appear that particularly in the last-mentioned series the 
conditions of the melting are far more unfavourable than in the case 
of the STEENSTRUP experiment. However, it is in reality still more 
unfavourable than the series of temperatures show. The freezing 
point temperatures are computed by means of the quantity of chlorine 
contained in the water samples taken, but as also proved by STEEN- 
sTRUP*) by means of direct measurements the quantity of chlorine 
in the mixture of melting water and sea water surrounding the ice- 
bergs will be perceptibly smaller than in the sea water itself, and 
the freezing point will consequently lie higher, and the mixture — 
according to the circumstances — thus contributes a more or less 
effective protection against the melting. In the case of the STEEN- 
STRUP experiment, for which a fragment of ice of 2 to 3 cubic deci- 
metres was used, this circumstance of course could not make itself 
felt; on the other hand it undoubtedly plays a part in the melting 
*) ALF TROLLE: Hydrographical Observations from the Danmark-Ekspedition. Medd. 
om Gronl. XLI, pp. 338 and 339. 
?) Bidrag til Kendskab til Bræerne og Bræisen i Nord-Grenland, Medd. om Gronl. 
КУ р’ 96. 
