or diatomaceous earth were incorporated in the diet in combination 

 with beef liver, hog liver, hog spleen and salmon viscera. 



Apple Pomace 



Apple pomace, the residue from vinegar production, proved to be 

 an excellent absorbing agent. The effect of this absorbent action 

 is brought out clearly in the 19^5 experiments in which the diets 

 were held for a two-day interval while being fed. In this case the 

 improvement in the feeding consistency made by the addition of apple 

 pomace to the diet equaled the contribution made to the growth rate 

 of a high-protein fish meal (Table 3, Diets 9 and 10). A repetition 

 of these trials in 19U7, when all diets were ground, mixed, and fed 

 within an eight-hour period, which eliminated the breakdown in the 

 bound diets due to storage, disclosed that apple pomace in the 1.9UB 

 trials made no contribution to the meat and viscera mixture other 

 than to improve its feeding consistency (Table h, Diets 5, 9, and 10, 



Tomato Pomace 



Tomato pomace, the dried pulp remaining after juice extraction, 

 was about comparable to apple pomace as an absorbing agent (Table 3, 

 Diets 10 and 11) and did not appear to offer much possibility as a 

 dietary supplement. As its contribution to the growth rate was not 

 significantly different from that of apple pomace in the 19U5 ex- 

 periments and the 19U7 trials indicated that the contribution of 

 apple pomace was negligible in diets of good feeding consistency, 

 it may be deduced that tomato pomace, also, would have no significant 

 influence on the growth rate when fed in conjunction with the meat 

 and viscera mixture. 



Kelp Meal 



In the 19h7 feeding trials, kelp meal w_s fed at the 10 per 

 cent level in the combination described above and compared with 

 this meat and viscera mixture when fed at the 100 per cent level 

 (Table I|, Diets 7 and 10). The results indicate that kelp meal 

 made no measurable contribution to the growth rate of blueback 

 salmon,, 



Diatomaceous Earth 



Diatomaceous earth, the only meal of the mineral type fed, 

 was tested in both the 19U5 and 19U7 trials but at different levels 

 in the diet. In the 19^5 experiments, this meal, when fed at the 10 



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