FOOD ANIMAL FOOD 263 



10. Farmers' Bulletin No. 249. Cereal Breakfast Foods. 



11. Farmers' Bulletin No. 256. Preparation of Vegetables for 



the Table. 



12. Farmers' Bulletin No. 293. Use of Fruit as Food. 



13. Farmers' Bulletin No. 295. Potatoes and Other Root Crops 



as Food. 



14. Farmers' Bulletin No. 298. Food Value of Corn. 



15. Farmers' Bulletin No. 332. Nuts and their Uses as Food. 



Experiment 85. The Amount of Water in Vegetables. 



Apparatus : Ring stand, asbestos mat, burner, evaporating 

 dish, balances, set of weights, hard glass tube. 



Materials: Potato, apple. 



a. Cut the potato or apple into small cubes, and weigh out 

 20 grams in an evaporating dish. Warm over the burner, at 

 first slowly and then more vigorously, until the material begins 

 to char. Then weigh again. How much water was driven 

 off from the 20 grams ? Divide this by twenty and multiply 

 by one hundred and obtain the percentage of water. In 100 

 pounds of potatoes, how much water is there ? 



6. Put the dried pieces in a hard glass tube, and heat 

 strongly. When smoke comes from the mouth of the tube, 

 it may be lighted. After all smoke has ceased being evolved, 

 weigh the residue. What is it ? See Experiment 18. 



194. FOOD ANIMAL FOOD 



While the flesh and some interior organs of animals are 

 used as food for man, and, although some animal food is nec- 

 essary for man, it is no doubt true that too much meat is 

 eaten. Meat is a decidedly rich and compact food, and man 

 needs but little to supply his wants. Meat is expensive, and 

 thus a proper study of the real necessities for food could cause 

 a person to have better health and to live less expensively. 



