94 



FEEDING FARM ANIMALS 



tical plan for computing rations for farm animals 

 based on them. 



Units of Measuring Heat. Quite generally the 

 fuel value of any material is expressed in calories. 

 A calorie is the amount of heat required to raise one 

 pound of water four degrees Fahrenheit. In the 



LABORATORY WHERE FOOD VALUES ARE DETERMINED 



This picture gives a general view of Armsby's respiration apparatus for 

 determining the net energy of the feeding stuffs. 



Armsby standards the fuel or net energy value is 

 expressed in therms. A therm is the quantity of heat 

 required to raise the temperature of 1,000 kilograms 

 of water one degree centigrade; it equals 1,000 calo- 

 ries and therefore represents the amount of heat 

 required to raise 1,000 pounds of water four degrees 

 Fahrenheit. 



