404 Alf Trolle. 



the east of the tidal fissure Maroussia — Sonja Havn moving quite 

 sloAvly eastwards, so that the channel became broader. In this Avay 

 a land-opening was formed, which grew from a breadth of some hun- 

 dred meters to several kilometers and later became a coastal water 

 similar to that found in August 1906. 



In Øresund the first opening was formed where the current ran 

 between Baadskær and C. Bornholm on June 20th, even before the 

 rivers had begun to flow. On July 13th the harbour was open and 

 on July 18th the ice had broken up everywhere in the sound. 



The ice conditions along the coast north and south of Skibs- 

 havn were at my request observed on various sledge journeys. It 

 was noticed, that the pack-ice lay as a rule almost as far in as the 

 line between the outermost skerries. At the following places open 

 spots in the pack-ice were repeatedly noticed at a time, when it lay 

 solid else\vhere. 



1. South of He de France. 



On October 15th 1906 large openings and spaces with thin ice 

 were observed here. 



On May 1st 1907 B. Thostrup, while on a sledge journey, 

 observed a large opening with new ice of ca. 10 cm. in thickness, 

 which was drifting southwards. 



On March 26th 1908 P. Koch, while on a sledge journey, 

 observed a broad, open space south of He de France; the opening was 

 broadest nearest to the island. 



Thus, there seems to be a constant tendency here towards tlie 

 formation of openings: probably the south-going current is compar- 

 atively strong and the island thus acts to dam up the ice-masses. 



2. 3Iallemukfjæld and N. E. Runding (see: PI. IV Medd. om Gronl. 



XLVI Nr. 2). 



On the sledge journey northwards in the spring of 1907 Koch 

 made the folIoAving observations (extracts from Capt. Koch's diary): 



On the stretch from С Bismarck to С Marie Valdemar the screw- 

 ice lay close up to the coast. Then no screw-ice was observed 

 until Jøkelbugt was passed. In the mouth of the fjord north of 

 Lamberts Land, Nioghalvfjerds Fjorden, there was a good deal 

 of screw-ice. Along the coast of Hovgaards Isl. the screw-ice lay 

 close to land. 



The sea-ice north of .Mallemukfjæld (80°09' N. L.) was very 

 much screwed, almost pulverized. Openings ran slantwise in towards 

 land and right to the land in the direction almost S. E. to i\. W. 



The .snow on the beach north of Mallemukfjæld (G. Holms Land) 

 had the character of ice and bore distinct signs, tliat the sea had 



