Hydrographical Observations from the Danmark Expedition. 299 



bottle into half-litre bottles with patent stoppers. For the sake of 

 certainty, these bottles were provided not only with paper labels, 

 which readily came off, but also with hemp or other kind of string 

 round the neck with a number tied in knots. 



In addition to this larger installation for hydrographical work 

 there was also an ordinary lead winch on the deck aft. Here we 

 had 600 m. double-turned wire. Both winch and line were of the 

 same kind as those used in the Royal Danish Navv. 



Fig. 4. Sledge with sounding-drum attached; C. B. Thostrup phot. 



Here we used Captain С Clausen's bathymeter (already mentioned 

 under the soundings). 



b. Hydrographical work from boat. 



A 600 m. double-turned wire, which had been taken as reserve 

 wire for the aft winch, was used. The motor-boats had not been 

 fitted up at home for the installation of a hydrographical winch. 

 Therefore we fitted up the apparatus ourselves in the following man- 

 ner. The wire was rolled on a small drum, whose axle rested on a 

 stand with two legs. One of these was fixed in the iron-work on 

 the rail of the boat, the other was lashed to a thwart by rope. Л 



