VI 



CONTENTS. 



CHAPTEE II. 



GEOLOQY or AGRICULTURE 



Form, Density, &c., of the Earth, . 



Stratified and TJnstratified Rocks, 



Relative Age of Rocks, 



Classification of Rocks, 



Origin of Soils, . ... 



Rocks and Minerals, 



Amending Soils, .... 



Physical Constitution of Soils, . 



Chemistry of Soils, .... 



Soils consist of an Organic and Inorganic Part, 



Organic Acids and their Salts, 



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OHAPTEE III. 



VEGETABLE PHYSIOLOGY. 



Germination of Seeds, 



Requisites of Germination, 



Process of Germination, 



B-rowth of Plants, 



Growing Plants Purify the Air, 



Sources of Carbon, &c., to Plants, 



Flowering and Seed-Bearing, 



Late Hoeing Injurious, . 



Structure and Circulation of Plants, 



Decay and Products of Plants, . 



Starch, Sugar, and Gum, Non-Nitrogenous, 



Gluten, Caseine, and Albumen, Nitrogenous, 



Transformations, .... 



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