Mar. 25, 191S Energy Valtces of Feeding Stuffs for Cattle 



465 



and accustomed to being handled, to the wearing of the apparatus for the 

 collection of excreta, and to the presence of the observers. 



Some idea as to the extent to which these precautions were successful 

 may be formed from a comparison of the quantities of heat produced after 

 correction to 12 hours standing on the two successive days of each 48-hour 

 calorimeter run. The first half of Table IX shows the corrected heat pro- 

 duction on the first and second days of each run and likewise the mean, 

 computed in the manner illustrated on page 454 for the entire 48 hours." 



Table IX. — Heat production per day and per head corrected to 12 hours standing 



a The 48-hour means differ from the means of the 24-hour periods for two reasons: First, the perccntaee 

 increase of the metabolism when standing over that when lying varied in the two days, as did also the 

 percentaKe of the total heat carried off as latent heat of water vapor. On account especially of the latter 

 difference, the mcau of the two days taken siiifily differs from that computed from the average heat pro- 

 duction per minute standing and lying for the whole 48 hours. Second, in experiments 190, 200. and 307 

 the corrected results for the 48 hours are computed from selected portions of the runs in the manner described 

 in an earlier publication (10, p. 43), and fhenf ore differ from the mean of the results for the single days. 



^ Methane computed from digested carbohydrates. 



