AGRICULTURAL CHEMISTRY 



422. Inspection of Feeding-Stuffs. During recent 

 years, many of the states have passed laws regulating the 

 inspection and sale of animal feeding-stuffs. The object 

 of such laws is to prevent adulteration of animal foods by 

 requiring manufacturers and dealers to guarantee the per- 

 centage amounts of crude protein and fat. Many of the 

 Kuropean countries have had such laws in force for a 

 number of years. It is noticeable that in those countries 

 and states where feeding- stuffs are subjected to in- 

 spection, the quality is better than where they are not 

 inspected. 



Experiment 73. Graphic composition of foods. Make a draw- 

 ing of some human or animal food material and indicate graphically, 

 the percentage amount of the different nutrients. If a hundred 



Fig. 91. Graphic composition of foods. 



millimeter rule is used in the construction of the drawing, each 

 linear millimeter will correspond to I per cent. If a food contains 

 12 per cent, water, 12 millimeters are measured off to represent the 

 water in the material, and so for each class of nutrients, an area 

 corresponding to its percentage amount. 



