450 APPENDIX 



trated in the last paragraph of the foregoing paper and 

 with the results contained in the following table, which 

 includes also the digestible (true) protein and the non- 

 protein. In regard to this table it is to be remarked: 



"First, both the digestion coefficients used by Henry 

 and Morrison and the data for the expenditure of energy 

 due to feed consumption are derived exclusively from 

 experiments on ruminants (in the latter case, on cattle). 

 Consequently, the net energy values here computed are ap- 

 plicable to ruminants only and not to horses nor to swine. 



"Second, the table shows primarily the net energy 

 values for maintenance or fattening. There seems good 

 reasons for believing, however, that they may be taken 

 without serious error to represent also the net energy 

 values for growth and at least the relative values for 

 milk production. 



"Third, in comparing the figures for the various feed- 

 ing-stuffs, account should be taken of the differences in 

 moisture-content. Many of Henry and Morrison's 

 averages for dry feeds show a remarkably low moisture- 

 content, tending to raise the suspicion that some of the 

 analyses averaged were made on partially dried samples, 

 although the authors state that every precaution was 

 taken to exclude such cases from the compilation. It is 

 evident at least that more study of the actual percentage 

 of moisture in feeding-stuffs as they are used in practice 

 is much to be desired. 



"Fourth, Henry and Morrison's tables include only the 

 crude protein (N X 6.25). The amount of non-protein 

 has been estimated from the crude protein by the writers 

 on the basis of Kellner's averages." 



In accordance with the method and data mentioned 

 the following table was calculated : 



