Plants from Our Standpoint 3 



ing of foods and the construction of their bodies. Some bacteria 

 increase the fertility of the soil by building nitrates and other 



J-hper 

 pulp 



'Vegetable 

 oils 



z/Tgm 



(food 



Jjamher 



tJuel 



Wood 

 disfillafes] 



Tib 



ers 



lowers 



'Uanning 

 ^solutions] 



PLANTS 



are the sources 



of our most essential 



commercial products 



and the agencies in many 



important processes 



Qutns 



U\ubber 



■^ 



esins 



'uermen- 

 tation 



mant 



^ 1 

 animai 



diseases J 



3). 



ja 



umtLs 



ecay 



2) 



rugs 



:S)yes 



pigments} 



S)rying 



oils 



Fig. 2. 



nitrogen compounds. Other bacteria and fungi cause most of the 

 diseases to which plants and animals are subject, and they are 

 being studied extensively in order that people may know how to 

 avoid, control, or destroy them. 



8. Plants a source of pleasure. Aside from all these great 

 economic considerations plants afford us an aesthetic pleasure 

 that cannot be measured in money but which is nevertheless real 



