Morgulis. — Studies on Fish Nutrition 49 



material had been dissolved by the water. It is a conservative 

 estimate that 50 per cent of the fat was washed out, and none 

 of the glucose was left in the residue, it having been entirely 

 dissolved out by the water. This happened in spite of the 

 fact that the food was contained in a limited quantity of water, 

 agitated only by the swimming movements of the trout. 



In hatcheries where the trout are kept in rapid streams of 

 water, it is questionable if a food which will so easily give up its 

 components to the water, is a particularly valuable diet. Its 

 inferiority to beef heart as a dietary article for trout is amply 

 demonstrated by the results of the experiments here recorded. 



