

25 

 20 

 J5 

 10 

 5 

 



ShoomLrGw/ens 



AVERAGE 



44v«*«^ fP03. 1913 



m 20 21 22 23 k 25 26 2? 28 29 30 31 32 33 k 35 







2 

 1 



ZeiiLrawlers 



AVERAGE 



> » f > » ' > 



» I I 



t I < » t 



m 20 21 72 23 2:^ 25 26 27 28 29 30 31 J2 33 % 33 



Fip;ure 3. — Catch-per-day's absence of English steeon and sail 

 trawlers, shown in hundredweight. (Steani travelers, 

 top; sail trawlers, bottom). Dotted line: Average 

 1909-13), 3D 



