THE SHIP AND ITS EQUIPMENT 



49 



the end of the longest line we fastened the large tow-net just 

 described. 



Fig. 32. — The "Michael Sars" towing Ten Nets and Pelagic Trawls. 

 (Surface net not shown. ) 



A difficulty which arose when organising this system was 

 that the cord by which a tow-net or trawl is attached to the 

 wire becomes easily entangled, in which 

 case the appliance is rolled round the wire 

 or else torn off. To avoid this we screwed 

 a brass knob (Fig. t,^,) on the wire and 



Fig. 33.— Brass Knob for Tow-Nets. 



fastened the tow-net to a brass ring, which 

 could be threaded on above the knob (Fig. 

 34), The appliance is thus kept from 

 sliding down the wire, and is free to move 

 in any direction (see also Fig. 32). This 

 method of working enables one to operate as many appliances as 



E 



Fig. 34.— Brass Ring 



for Tow-Nets. 



