SEA-FISHERIES LABORATORY. Dey 
such as the unequal distribution of the fish population. 
Further, the method is that of ‘‘ proportional parts,”’ 
and it is assumed that a change in the function is 
proportional to a change in the argument, and this may 
be very far from being the case when 2 changes by large 
One haul of a 6 inch trawl net in Red Wharf Bay, 
30th November, 1910. 
Mean length Nos. actually Integrated Disintegrated 
caught. from the curve. 
16-5 12 2228 8 
17-5 18 2216 28 
18-5 55 2198 49 
19-5 66 2143 78 
20-5 125 2077 127 
21-5 165 1952 153 
22-5 165 1787 169 
23-5 166 1622 176 
24-5 173 1456 167 
25-5 156 1283 163 
26-5 181 1127 160 
27-5 169 946 175 
28-5 215 7177 223 
29-5 218 562 217 
30-5 138 344 137 
31-5 79 206 86 
32:5 65 127 52 
33:5 29 62 35 
34:5 21 33 20 
35-5 K7 12 10 
36-5 2 5 2 
37-5 2 3 2 
38:5 0 1 1 
39-5 1 ] 0 
2228 2238 

increments. In such a case ‘‘smoothing’’ by this 
method would result in a displacement of the whole 
curve, its mode and phase being affected. 
The method adopted in the example just given was, 
I think, suggested by Mr. A. L. Bowley. The actually 
Ney 
