362 
Journal of Agricultural Research 
Vol. XXI, No. s 
energy, which in a maintenance ration also represents the heat pro¬ 
duction. The respective live weights and rations per head in the two 
other cases are as follows: 
Fattening lambs, average live weight 81.4 pounds— 
Shelled com, 1.3 pounds. 
Alfalfa hay, 1.4 pounds. 
Breeding ewes, average live weight 90.3 pounds— 
Shelled com, 0.27 pounds. 
Wheat! bran, 0.14 pounds, 
linseed meal, 0.05 pounds. 
Clover hay, 2.08 pounds. 
Silage, 2.09 pounds. 
TOTAL HEAT PRODUCTION OP SHEEP 
By applying to the foregoing rations the estimates and assumptions 
of the two preceding paragraphs, the total heat emission for sheep may 
be computed, and from that the heat emission by radiation and conduc¬ 
tion, the latent heat of water vapor, the amount of water vapor, and the 
amount of carbon dioxid produced, exactly as for the other species. 
The results are as shown in Table XVI. 
Table XVI.— Heat emission , water vapor , and carbon dioxid produced by typical sheep 
per day and per head 
Animal. 
Average 
live 
weight. 
Total 
heat 
emission. 
Heat 
emission 
by radia¬ 
tion and 
conduction. 
Latent 
heat of 
water 
vapor. 
Water 
vapor. 
Carbon 
dioxid. 
Fattening lambs. 
Breeding ewes. 
Sheep on maintenance.. 
Pounds. 
81. 4 
90-3 
100. 0 
Calories. 
2,044 
2, 021 
483 
Calories, 
h 533 
1. 5 I( > 
I, 112 
Calories. 
5 I 1 
505 
37 i 
Gm. 
871 
860 
632 
Gm. 
818 
808 
593 
VENTILATION AND STABLE TEMPERATURE 
The method employed by King to compute the rate of air flow for the 
different species has been given in an earlier paragraph of this paper. It 
was also shown that, assuming average figures for the percentage of car¬ 
bon dioxid in the air coming from the lungs and in pure air, respectively, 
the air flow thus computed corresponds to 0.167 volume per cent of 
carbon dioxid in the stable air. Taking 0.167 P er cen ^ carbon dioxid as 
a standard, we have computed Table XVII, showing the rate of air flow 
that will be required to maintain this standard of purity when based on 
the average computed carbon-dioxid production by the different species 
in the examples shown in Tables VII, XI, XIV, and XVI. The last 
column in the table, giving King’s figures for the air flow, has been 
inserted for the sake of comparison. 
