45» 
Journal of Agricultural Research 
Vol. XI, No. io 
the percentage of organic matter in the total gain in live weight is 
assumed to have been the same as that observed by Lawes and Gilbert 
for fattening cattle—viz, 73.89—the gains of organic matter recorded in 
Table X are equivalent to a gain in weight of 1.275 kgm. (2.8 pounds) 
per day in period 2 and 0.979 kgm. (2.2 pounds) in period 3. The experi¬ 
mental periods were too short to permit very satisfactory conclusions to 
be drawn from the live weights of the animals. Those weights, taken 
at about 7 a. m., after the morning feeding and before the daily watering, 
are shown in the accompanying graph (fig. 1). The straight lines in 
periods 2 and 3 represent the rates of gain, as computed above, which 
appear to correspond fairly well with the observed weights. The averages 
of the last six weighings for each period were as follows: 
Period 1 
Period 2 
Period 3 
Period 4 
490 kgm. 
536 kgm. 
655 kgm. 
642 kgm. 
A comparison of these estimated gains in weight with the feed con¬ 
sumption yields the results of Table XI. Obviously no great accuracy 
can be claimed for these computations, but nevertheless they show 
clearly a decreasing efficiency of the total feed. 
Table XI .—Feed consumed per unit of estimated gain in weight 
Period No. 
Total feed. 
Dry matter. 
Digestible 
organic 
matter. 
2. 
8. 2 
7. 2 
e. 2 
2 . 
11 . 6 
IO. I 
D 
9.6 
HEAT EMISSION AND PRODUCTION. 
The measured emission of heat by the animal in the several periods 
and subperiods is recorded in Table 6 of the Appendix. In the periods 
on the heavier rations, both in the unfattened and fattened state, a 
notably larger proportion of the additional heat produced by the animal 
was disposed of by the evaporation of water, as appears from Table XII. 
