Chabt n. — {From Farmers^ Bulletin Nwmher 23). 



A calorie equals the amount of heat necessary to raise the temperature of i 

 kilogram of water (2.2 lbs.) from to 1° Centigrade, i.e. lg° Fahrenheit. It 

 is possible to determine the amount o* heat energy that a given amount of any 

 nutrient can produce in terms of these calories, and hence they furnish con- 

 venient units to express the fuel value or energy producing power of foods. 



EDDY. PHYS. - 



65 



