506 PRINCIPLES OF ANIMAL NUTRITION. 
Energy per Meter Traveled (Including Work of Ascent). 
Per kg. total mass * ...... 6.2.0 ee eee eeee 0.3948 cal. 
73 
Per kg. live weight ..... ea gdaly de daciwicaness Heel kem. 
Work of ascent ....... 0.00 c ccc ee eens 8.643 gr.-m. 
Determinations of the work of locomotion were made in six 
different periods, or thirty-five experiments in all. The average 
for each period, computed in terms of energy as in the above 
example, is given in Table VIII of the Appendix. It is to be noted 
that these results still include the small amount of work expended 
in ascending the slight incline. This factor is determined in the 
manner shown in the following paragraph. 
Work of Ascent.—In four periods experiments were ans (thir- 
teen in all) upon the work of ascending a moderate grade at a walk. 
The average results, computed on the same basis as before, are 
contained in Table IX of the Appendix. 
By comparing the average results of these two series of experi- 
ments in the manner explained on p. 500, letting x equal the oxygen 
or energy required per kilogram live weight for locomotion through 
1 meter horizontally and y the corresponding quantities for the 
performance of 1 gram-meter of work of ascent we have the follow- 
ing equations: 
For Oxygen. 
z+ 4.395y= 83.480 c.mm. 
2+107.041y=222.941 c.mm. 
For Energy. 
t+ 4.395y=0.4035 cal. 
2+107.041y=1.0795 cals. 
Solving these we obtain the following values respectively for 
the work of locomotion per meter and for the energy expended in 
ae: Energy. 
c mm. 
cals. Kem. 
Locomotion per meter: 
Per kg. live weight............. 77.509 0.3746 0.1592 
total mass............ 75 .048 0.3618 0.1538 
Ascent, per kilogram-meter...... 1359 .00 6.5858 2.7990 
* Weight of animal plus weight of apparatus carried. 
