THE OFFICES OF THE ANIMAL 203 



crops, as clover, carry away much more plant- 

 food, if they are sold off the farm, than the 

 animal products which, in large part, are elabo- 

 rated from them. 



4. The Animal Has Intrinsic Value to Man 

 4a. As articles of food 



342. Animals are direct sources of food. 

 They contribute the various kinds of flesh, as 

 beef, pork, poultry, fish. 



343. Animals are indirect sources of food, 

 contributing of their products, as eggs, milk. 



344. Animals also contribute materials to 

 various manufactured food products, as cheese, 

 condensed milk, butter. 



46. As articles used in the arts 



345. Animals contribute materials for cloth- 

 ing. Amongst such products are leather and 

 wool. They also afford material for many 

 articles of personal use, as feathers, bone, hair, 

 glue, horn. 



346. Animals contribute largely to fertilizing 

 materials, particularly to substances containing 

 nitrogen and phosphoric acid. Amongst such 

 materials, the most important are bones, dried 

 blood, tankage ; of secondary importance are 



