6io 



Journal of Agricultural Research 



Vol. X, No. 12 



It would appear that the factor 3.9 therms per kilogram of digestible 

 organic matter proposed by the writers (2, p. 453) for concentrates con- 

 taining less than 5 per cent of fat is somewhat high for maize meal and 

 that 3.8 would be more nearly correct. Applying the latter factor to 

 Henry and Morrison's averages for the digestible nutrients, and using 

 the average result for the heat increment per kilogram of dry matter 

 which was reported in a previous paper — viz, 1.289 therms per kilogram 

 dry matter — gives the results in Table XVII. 



Tabls XVII. — Energy values of average maize meal per kilogram dry matter 



Calories. 



Metabolizable energy 3, 402 



Energy expended in feed consumption i, 289 



Net energy value 2, 1 13 



AVERAGE RESULTS ON HOMINY FEED 



The composition of our sample, as shown by Table I, corresponded 

 substantially to Henry and Morrison's average of 778 samples of high- 

 grade hominy feed. No other determinations on the influence of hominy 

 feed upon the heat production of an animal have been reported, but the 

 average of nine determinations by Lindsey (6, 7) of its digestibility by 

 sheep is given by Henry and Morrison (5, p. 647). 



A reference to the original shows that the "English hay" used in eight 

 out of the nine experiments was notably lower in protein than the mixed 

 hay used in our experiments. Whether or not as a consequence of this 

 lack of protein, three experiments out of the nine showed coefficients dis- 

 tinctly lower than the remainder — viz, for dry matter 71 per cent, 75 per 

 cent, and 78 per cent. If these three apparently exceptional results are 

 omitted, the average of the remaining six corresponds very well with our 

 data, as Table XVIII shows. 



Table XVIII. — Percentage digestibility of hominy feed 



Constituent. 



Lindsey's results. 



Nine ex- 

 periments. 



Six experi- 

 ments. 



Our results 



(two ex- 

 periments). 



Average of 

 Lindsey's 

 six and our 

 two experi- 

 ments. 



Dry matter 



Organic matter 



Total nitrogen 



True protein 



Crude fiber 



Nitrogen-free extract . 

 Ether extract 



82. 94 



87. 16 



65-53 



68.59 



75.60 

 89.61 

 91. 16 



87.87 

 92. 18 

 90. 00 



87.27 

 88.91 

 72. 12 



67-34 

 78.94 



91- 54 

 95-92 



87.19 

 88.91 

 69.47 

 67-34 

 85.64 

 92. 82 

 91.48 



Regarding the figures of the last column of Table XVIII as represent- 

 ing the average digestibility of hominy feed, we may compute from the 



