136 American Fisheries Society. 



I shall not detain you, but if there is any information you want I shall 

 do my best to furnish it. 



Mr. George Berg: We have had cases where trouble developed 

 when the young fish reached about three-quarters of an inch. We term 

 it "cotton-mouth," just among ourselves. The fish have a sort of growth 

 in the mouth; it looks something like a fungus, and it affects them 

 so seriously that they die off in large numbers. This year we lost some- 

 thing like fifteen or twenty thousand from that cause. The gentleman 

 from New Jersey is the only one I know of who has also experienced 

 it, and he does not know exactly what it is either. 



Mr. Kopplin : I have had experience along that line, and I attribute 

 it to oil draining off our roads into the ponds. When we eliminate 

 the oil we can eliminate the trouble. 



Mr. Berg: We have nothing of that sort. It might be due to some- 

 thing the fish eat. 



Dr. Embody: Am I correct in understanding, Mr. Bullock, that 

 you spoke of there being as much as 60 parts per million of carbon 

 dioxide? 



Mr. Bullock: That is what the state analysis gives. 



Dr. Embody: Did you have a statement of the percentage of free 

 oxygen? 



Mr. Bullock: No. The analysis is taken from the State bulletins. 

 The analysis is given therein of the waters of all the larger springs 

 in the State of Georgia. The free oxygen in the water of our springs 

 was not given. 



Mr. Embody: Sixty parts per million is so unusual that it seems 

 almost like a miracle to me that any fish we have in this country could 

 live in such waters. 



Mr. Bullock: That occurs at the spring. The water flows from 

 there a few hundred feet to a stone crib; then it flows a few hundred 

 feet to the ponds, falling out of the crib to the lower line of pipes with 

 considerable splash — all tending to aerate it. But I am simply giving 

 the figures to you as published. 



Dr. Embody: It is very interesting. 



Mr. Titcomb: I should think that the Society for the Prevention 

 of Cruelty to Animals ought to interfere when importing bass from wild 

 waters to any such place as that. 



Dr. Moore: The carbon dioxide might be well shaken out by aera- 

 tion by the time the water reaches the ponds. 



Dr. Embody: I should think you would have a rather dense growth 

 of green aquatic plants, which would eliminate it still more. 



Dr. Embody: Some of the members of the Society have 

 asked for a symposium on foods and feeding of fishes. As 

 I understand it, they desire a general discussion of what 

 foods are used in the various hatcheries, w^hat species of fish 

 are fed, how the foods are prepared, what experimental work 



