Nov.. 1931] FOODS IX A COLLEGE COMMUNITY 35 



giiished from kitchen refuse) can be calculated with reasonable accuracy 

 by multiplj-ing the air-dry weight in grams by the factor 5, if \'isible 

 fat is not present. If there is visible fat and it can be removed easily, 

 its energy vakie should be calculated separately by multiplying its 

 weight in grams by the factor 9, and the rest of the waste should then 

 be considered to have an energy content of 5 calories per gram of air- 

 drv matter. 



