AGRICULTURAL SUBSTANCES CARRY FORCE 2Q 



plants and animals, and in making use of some of these 

 minute plants for economic purposes. These plants 

 have no flowers or seeds such as larger plants have, and 

 usually a microscope must be used to work out their 

 life histories. 



The farmer who does not seek to learn the interesting 

 things about plants is constantly losing a large part of 

 the enjoyment which nature has made so abundantly 

 available to him. Facts about plants which are avail- 

 able in books on botany, horticulture and agriculture, 

 and taught in agricultural schools, are of great value to 

 those who till the soil. 



Bacteriology has brought to light a world of important 

 facts regarding the many germs which breed disease 

 in plant and animal bodies, which cause decay in dead 

 organic substances, which aid in elaborating plant food 

 from soil and air, which assist in transforming the food 

 in the digestive canal of the animal, and in many other 

 ways take part in plant and animal production. Bac- 

 teria and other very small organisms are so simple in 

 their structure that it is difficult to class them with 

 animals or plants; they are so simple that they have 

 not the special organs or functions of either. 



Zoology. The science of animal life is full of inter- 

 esting things. There is no study more profoundly inter- 

 esting than that of the development of species in animals 

 and in plants. Every species of animal has a different 

 life history, and many of its habits, when known, are 

 very interesting. The anatomy, or structure, and the 

 physiology, or functional activities, of each species of 

 wild, and especially of domesticated, animals is of inter- 

 est. The experiment station officers and others are 

 working out methods of feeding, breeding and managing 

 live stock that are of great value to the farmer. 



Entomology. This division of zoology deals with in- 

 sects and is full of interesting facts. Descriptive 



