Hydrographical Observations from the Danmark Expedition. 



297 



2. Installation of the instruments and method of carrying 

 out the observations. 



a. Hydrographical investigations îrom the ship. 



The winch for soundings and hydrographical work was situated 

 on deck to port in front of the main hatch. The drum held 3000 m. 

 of 3 mm. steel wire from Felten & Guillaume, with a breaking power 

 of 500 kg. The 

 brake was formed 

 by a band round 

 the axle. On haul- 

 ing in, the drum 

 axle was coupled 

 up to an axle with 

 a chain-wheel driv- 

 en from the winch 

 by means of a chain. 

 Above there was an 

 axle with a small 

 toothed wheel, on 

 which two handles 

 could be fixed and, 

 when hand power 

 had to be used to 

 haul in, the toothed 



wheel could be 

 shunted into con- 

 nection with a large 

 cog-wheel on the 

 drum axle (see fig. 

 2 and 3). 



Hauling in under 

 steam proceeded at 

 a rate of about 100 

 m. per minute. 



An eye was splic- 

 ed into the end of 

 the steel-wire and 

 led from the drum 

 up through a large meter-wheel, suspended by a spring hook from 

 an accumulator, which again was screwed and bolted fast at the end 

 of a 3.2 cm. davit. The eye at the end of the wire was then fixed 

 to the lead by means of a shackle or to the water-bottle with an 

 ordinary screw-bolt. (The accumulator is not seen in the figure ; 

 the spring hook on the meter-wheel is here suspended in a strop 

 round the end of the davitj. 



Fig. 2. Winch foi' soundings and hydrographical worlt; 

 С В. Thostrup phot. 



a, chain to winch, b, tootlied wheel on the axle, broutîht into use when 



hauling in by hand, c, axle do. d, cog wheel on the axle, for hauling 



in with steam, e, band brake. 



