1915] Michael, ct al. : Eydrographic Records of Scfipps Instifutloii 201 



The first eight nets are ordinary surface tow-nets (see p. 9) ; 

 the next four, Nansen closing nets (see p. 10) ; the next two, Kofoid 

 closing nets (see p. 11), and the last a special net designed for 

 making open vertical hauls. In order to increase the filtering capacity 

 the netting was cut very full and gathered, its original diameter 

 exceeding by two or three times that of the orifice. The net was used 

 but a short time during July, 1912, when it was lost. 



APPENDIX II 



Length in Meters op Hauls Made during July, 1912, with 

 THE Kopoid Closing Net 



In the following list the duration of each haul is entered to the 

 nearest minute and each length of haul to the nearest meter, while 

 the haul numbers are those entered in table 5. Each length of haul 

 was computed from the duration of the haul and the velocity, relative 

 to the water, with which the net moved. Since the velocity was 

 measured by an Ekman current meter suspended below the net, as 



