IMPOVERISHMENT OF THE GROUNDS 263 



hand, the average catch per trawler has, on the 

 whole, fallen, except for the years 1895 and 1896, 



THICK LINE: total quantity of fish caught ; numbers 

 represent hundreds of tons. 



THIN LINE: numbers of steam trawlers. 



DOTFED LINE: average catch of fish f>er year per 

 trawler; numbers represent tons 

 of fish caught. 



1890 1891 18951 (893 189+ I8p5 I8p6 18^7 1898 1809 



Scottish Flat Fish Trawl Fisheries : Chart to show the Relation between the 

 Total Flat Fish caught and the Means of Capture. 



when the otter-trawl came to be generally used, 

 and, by its great superiority over the old beam- 



