SEA-FISHERIES LABORATORY. 



261 



Fig. 4. 



-Lucas Sounding Machine, as used with Nansen 

 vertical closing net on " Ladybird." 



Fig. 5.— The 

 ' ' Monaco ' ' Water- 

 bottle ; on the 

 right descending 

 open, on the left as- 

 cending closed. The 

 messenger (on the 

 line) which strikes 

 the lever, raises the 

 pin and so allows 

 the brass bottle to 

 reverse and close 

 itself, is seen in each 

 case at the top of 

 the .figure. The two 

 projecting sockets 

 arc for the reception 

 of a thermometer 

 which reverses with 

 the water-bottle. 



