CONTENTS. 



LECTURE I. page 



Introduction. General Views of the Objects of the course, 

 and of the order in which they are to be discussed 3 



LECTURE II. 



Of the general Powers of Matter which influence Vegeta- 

 tion ; of Gravitation, of Cohesion, of Chemical Attrac- 

 tion, of Heat, of Light, of Electricity, ponderable Sub- 

 stances, Elements of Matter, particularly those found in 

 Vegetables, Laws of their Combinations and Arrange- 

 ments - - -23 



LECTURE III. 



On the Organization of Plants. Of the Roots, Trunk, and 

 Branches ; of their Structure. Of the Epidermis. Of 

 the cortical, and alburnous Parts of Leaves, Flowers, and 

 Seeds. Of the Chemical Constitution of the Organs of 

 Plants, and the Substances found in them. Of mucila- 

 ginous, saccharine, extractive, resinous, and oily Sub- 

 stances, and other vegetable Compounds, their Ar- 

 rangements in the organs of Plants, their Composition, 

 Changes, and Uses - 50 



LECTURE IV. 



On Soils : their constituent Parts. On the Analysis of 

 Soils. Of the Uses of the Soil. Of the Rocks and 

 Strata found beneath Soils. Of the Improvement of 

 Soils. - - 136 



LECTURE V. 



On the Nature and Constitution of the Atmosphere, and 

 its influence on Vegetables. Of the Germination of 



