43 



c, a cup thermometer is immersed a few inches below the 



surface, and the temperature read and noted, 



d, a bottom reversing thermometer is lowered on a 



sounding line, and the bottom temperature is noted, 

 the depth at the same time can be verified to show 

 the ship is on the right spot, 



e, a bucket of water is drawn from the surface and the 



specific gravity (at the particular temperature) taken 

 and noted, 



/, by means of a " water bottle " a sample of water from 

 the bottom is brought up and the specific gravity (at 

 the particular temperature) taken, and noted, 



g, note on a form the date, station, time, state of tide, 

 wind, weather, state of sea, air temperature, and 

 barometer reading, 



h, lower the trawl, with a bottom tow-net attached to 

 one end of the beam, 



i, put out a surface tow-net. At certain times and localities 

 it might be desirable to add a " mid-water " tow-net, 

 after the plan adopted by Prof. M'Intosh with such 

 success, for the capture of the larval and post-larval 

 stages of food fishes; also it would be a good plan 

 to have an ordinary Naturalist's dredge down for 

 a portion of the time the trawl is overboard — say 

 half-an-hour — in order to determine whether it gives 

 any different results in regard to the nature of the 

 bottom, and of the fauna. 

 On arriving at the end of the " Station " the following 



would be the procedure : — 



k, haul in surface tow-net and transfer contents to large 

 wide-mouthed jar of clear sea-water labelled "surface 

 tow-net " and put it aside in laboratory, if mid-water 

 net is used, treat it in the same way, 



I, bring in the trawl net, 



