RAPPORTS. XIII G 2: THOMPSON 



— 4 



separately analysed for the whole series of years under consideration. We thus get sta- 

 tistics and curves which represent the typical or average composition of the catch for the 



200 



.-^^leo 



120 

 E 80 



=3 



40 



10 20 30 40 50 60 70 80 90 100 



Fig. I. Total number of Cod caught, at each centimetre of length, in the Firth of Forth, 

 during the quarterly period January— March (1903 — 9). 



10 20 30 40 50 60 70 80 



Fig. 2. The same for the period April — June. 



90 



100 



middle of each of these quarterly periods, that is to say for the months of February, May 

 August and November. ' The actual numbers are given in Table I, and the curves illus- 

 trating them are shown in figures i — 4. We may add to these, and may represent 



