30 FARM DEVELOPMENT 



entomology tells of the life histories of the various 

 insects, and the stories of the work of these won- 

 derful little creatures are full of interesting surprises. 

 The patient entomologists have worked out methods 

 of combating many injurious insects and have learned 

 that many of them are by nature our friends and should 

 be protected. A knowledge of how to combat those 

 that obtain their food by sucking the juice out of 

 plants and those that chew their food is both interesting 

 and useful to the farmer. 



The agricultural sciences. While the practice of agri- 

 culture is mainly art, agricultural science is becoming 

 the most wonderful of sciences, in part because nearly 

 all the other sciences contribute to agricultural science. 

 Only recently have the facts of agricultural theory and 

 practice been brought together in a systematically ar- 

 ranged form. A literature of scientific, practical agricul- 

 ture is being written, most varied in kind, most wonder- 

 ful in extent, most interesting in character, and most 

 useful in its economic relations. No other science in- 

 terests so many people, nor are the lives and work of 

 any other industrial class brought so close to the laws, 

 the forces, the materials, and the enjoyable objects of 

 nature. 



The principal subjects under which a knowledge of 

 farming is obtained are : Agriculture, or agronomy, the 

 study of field agriculture ; horticulture, the study of 

 garden and orchard crops ; animal industry, the study 

 of animal production ; dairy industry, the study of dairy 

 stock, dairy production and dairy manufacturing; vet- 

 erinary science, the study of the diseases and hygiene of 

 animals ; breeding, the study of how to originate animals 

 and plants with heredity which will produce higher 

 economic and artistic values; agricultural chemistry, 

 the study of the chemistry of soils, plants and animals ; 

 and rural engineering, the study of machines, buildings, 

 roads, drainage, etc., relating to the farm. 



