American Fisheries Society 139 



is intended more for the general pond of fishes, and therefore I 

 do not see any chance for discussion. 



President : There is one small matter to which 1 wouhl 

 draw attention, for Mr. Townsend lias written a general paper. 

 The statement is made that after the depth of six or eight feet, 

 the temperature will fall at the rate of about two degrees for 

 each foot of depth. That is gohig to depend on the depth of the 

 pond, and on the area, and while that may be true in ponds of 

 very limited size and depth, yet if ponds are to be taken which 

 will range from half an acre \\\) to twenty acres, with consider- 

 able difference in depth, there will be found a good deal of dif- 

 ft'rence in regard to tbis matter of teiii]H'rature. There will be 

 found a point in any pond oL' consideral)le depth where the tem- 

 perature falls rapidly, but the depth and the rapidity will depend 

 on cpiite a complex factor. 



Is there further discussion of the paper? 



Mr. Lydell : One feature of the paper was the large month 

 Ijlack bass. My large mouth bass have all spawned on gravel 

 this year, with the exception of two or three pairs. There were 

 no beds placed for theni, the old gravel beds were left in, and the 

 large mouth bass sought the gravel, and all spawned there Avith 

 the exception of three or four pairs, and I think 1 had the best 

 success with the large mouth bass this year of any in m}- ex- 

 perience. 



