AGRICULTURE 



THROUGH THE LABORATORY 

 AND SCHOOL GARDEN. 



OUTLINE OF CHAPTER I. 



NATURE AND FORMATION OF SOILS. 



^.—SOURCES OF ENERGY. 



I. The Earth's Energy. 

 II. The Sun's Energy. 



^.—FACTORS OF SOIL FORMATION. 



I. The Atmosphere. 



1. // Ri gulates tlic Teniperaiure. 



2. Move merits of the Af/n, sphere. 



3. CJiemical Action. Experiment i. 



4. Alternations of Heat a?id Cold. 



IL Water. 



1. Chemical action. 



2. Mechanical Action. Disintegrating, trafisporting, 



assorting. Experiment 2. 

 (i) Rivers. Experiment 3. 



(2) Underground Streams. 



(3) Landslides. 



(4) Lakes. 



(5) The Ocean. 



(6) Frost. 



