482 
Journal of Agricultural Research 
Vol. XXXI, No. 5 
Turning to Table XVI, a considerable variation in the values for 
maintenance in the alternate periods may be noted, these values 
being lower in the periods in which alfalfa meal was fed. Such a 
variation can not be accounted for by differences in live weight, as 
these were very slight (Table XIV). Nor can it possibly be ascribed 
to the plane of nutrition, for the alfalfa hay rations and the alfalfa 
meal rations were practically the same. It is also unlikely that the 
activity of the animal would vary with such a regularity in the 
alternate periods. Tracing this back to the heat-increment values, 
in Table XV, it is to be noted that while the heat-increment value of 
alfalfa meal as obtained by comparison of periods 2 and 4 (934 
Calories) is lower than the corresponding value for the hay (980 
Calories) , the heat-increment values of the meal involving period 6 
are considerably higher than the corresponding values for the hay, 
making the average heat-increment value of the meal higher than 
that of the hay, and the values for maintenance lower. Whatever 
the ultimate cause may be, the indication is that when computed by 
the current method the divergent period 6 is responsible for making 
the average net-energy value of alfalfa meal considerably lower than 
that of alfalfa hay, which is hardly possible. It is apparent, therefore, 
that the new method of computation places the net-energy values on 
a more accurate plane. 
Example 5, from Experiment 186 
• Table XVIII .—Data for computation of net-energy values of red clover hay 
Period No. 
Animal 
Average 
live 
weight 
Dry 
matter 
eaten 
Metabolizable 
energy 
Heat pro¬ 
duction • 
Gain of 
energy 
Per 
kilogram 
of dry 
matter 
Total 
Steer 
Kgms . 
Kgms. 
Cals. 
Cals. 
Cals. 
Cals. 
2.9333 
2,019 
5,922 
10,597 
-4,675 
16..... 
2.9333 
2,019 
5,922 
11,321 
—5,398 
T 
C79 
5.0353 
2,129 
10,690 
11,268 
-578 
2 6. 
1 
5.0253 
2,129 
10,690 
11,113 
-423 
4.1391 
2,082 
8,614 
10,605 
-1,991 
4.1391 
2,082 
8,614 
10,677 
-2,062 
« Revised, see footnote to Table II. 
Table XIX. —Heat increment per kilogram of dry matter of red clover hay ° 
Series 
Periods compared 
Heat 
increment 
per 
kilogram 
Series 
Periods compared 
Heat 
increment 
per 
kilogram 
(l 
la and 3a._ 
Cals. 
7 
748 
321 
6. 
15 and 36_. 
Cals. 
-534 
492 
-99 
a 
2a and 3a. __ 
b . 
26 and 36. 
q 
1 a and 2a ___ 
b ... 
16 and 26... 
« Computed from the revised figures for heat production. 
Experiment 186 has been considered by Armsby and Fries as an 
unsatisfactory experiment, as judged by the abnormally low and 
divergent heat-increment values. The computation of these values 
from the revised figures for heat production (Table XIX) reveals this 
