364 
Journal of Agricultural Research 
Vol. XXI, No. 5 
the daily volume of air per head required by King’s standard or that 
computed in Table XVII from the carbon-dioxid production is: 
Species. 
By King’s 
standard 
By our 
estimates. 
Calories. 
405 
49 2 
*59 
104 
Calories. 
394 
264 
88 
38 
Horses. 
Swine. 
Sheep . 
Supposing now that all the heat eliminated by the animals by radia¬ 
tion and conduction is imparted to the air passing into and out of the 
stable—that is, assuming that no heat is lost by radiation through the 
walls of the stable—this heat is capable of maintaining a temperature 
difference in degrees Fahrenheit equal to the daily heat emission per 
head by radiation and conduction divided by the figures of the foregoing 
table. 
MAXIMUM TEMPERATURE DIFFERENCE MAINTAINED BY THE DIFFERENT 
SPECIES 
By the method just described and by the use of the corresponding 
heat elimination values a calculation has been made of the maximum 
average difference in temperature between the stable and the outside 
air that can be maintained by the animal when King’s (14) standards 
for ventilation or those computed from the carbon-dioxid production in 
Table XVII are used. This calculation is given in Table XVIII. 
Table XVIII .—Average temperature difference maintained by animals 
Average temperature 
difference. 
Species. 
Average 
live 
weight. 
Correspond¬ 
ing to 
air flow 
computed 
by King. 
Correspond¬ 
ing to 
air flow 
computed 
from 
carbon- 
dioxid 
produc¬ 
tion. 
Cows a . 
Pounds. 
1,075 
1,250 
280 
°F. 
35-6 
19. 6 
20. 0 
°F. 
36 . 58 
36.49 
36.40 
36 . 5 ° 
Horses .. ’... 
Swine.. 
Sheep. 
9 1 
13-3 
a The average heat emission by radiation and conduction by cows in milk were used for the computation. 
On the basis of the average figures for the temperature difference 
given above, Table XIX has been computed, showing approximately 
the temperature of the stable when air enters at different temperatures, 
