154 American Fisheries Society. 



right type of man assigned the task of correlating all the facts and 

 working down to fundamentals, I believe that very definite results 

 could be produced. Take the different results obtained through the 

 use of shrimp meal: of course, no two shrimp meals would be alike. For 

 instance, one might have been scorched ; undoubtedly some vitamines 

 may have been destroyed in the process, so that different effects would 

 be produced in different cases. If, therefore, you could hit upon a 

 shrimp meal of the right type, your feeding problem would be largely 

 solved. The same would be true in a large measure of fish meal. I 

 happened to be talking to a fish meal producer in California; I do not 

 know how much truth there is in what he says or to what extent his 

 reasoning is on a scientific basis, but he produces a fish meal that is 

 much better than any other produced in that part of the country. He 

 produces it in non-reducing atmosphere where the oxygen has very 

 little effect upon the meal in its production, and he produces a meal that 

 is not in the least degree scorched. He uses very fresh fish, and he 

 claims that when fed to dairy cows reactions are obtained which 

 could not be brought about by the use of the ordinary fish meal. Now, 

 the vitamine content of that meal, taken in connection with other 

 accessory food factors, must have some bearing on the reactions that 

 they get in these cows, and it is quite possible that all these things 

 would have a very direct bearing on the feeding of the fish if they 

 could be brought to the stage where they are definitely known and 

 understood. 



Mr. Titcomb: The object of this whole symposium is to bring to- 

 gether the experiences of all the fish culturists, and it is my suggestion 

 that the man who is called on to give his little story on the subject 

 should be allowed to give the whole of it; then that he should be ques- 

 tioned on it; then that somebody else should go on in the same way. I 

 would like to ask Mr. Hayford to continue what he was saying about 

 the feeding of shi-imp, and to ask him what results he has had in that 

 connection. 



Mr. Hayford: We are feeding shrimp to the brook, brown and rain- 

 bow trout — that is the big end of it. We have not been able to get 

 the shrimp in sufficient quantities to be able to feed more than ten or 

 fifteen per cent. Our present ration is eighty-five pounds of sheep's 

 plucks — the heart, liver and lungs of sheep — and fifteen pounds of 

 shrimp. That produced very good results with us last year. 



Mr. Titcomb: Do you boil the shrimp before you grind it? 



Mr. Hayford : No, we simply soak it in cold water to get rid of the 

 swelling. In order to do this work as we wanted to do it we bought an 

 International No. 6 Type "B" Feed Mill, such as the farmers use for 

 grinding grain. You can put the clam or the shrimp or most any of 

 these products into that and grind it almost to a dust if you want to. 

 We grind the plucks and the whole thing together, after the meal is 

 added, spread it right out on the floor, take an ordinary scoop shovel 

 and shovel it right into this hopper. 



