CONTENTS. 



INTRODUCTION 



CHAPTER I. 



General Views of the Atmosphere, considered in 

 ITS Effects upon Vegetation .... 1 



Article 1. Of the Ponderable Fluids contained in the 



Atmosphere 3 



2. Of the Imponderable Fluids contained in 



the Atmosphere • 



CHAPTER II. 



Of the Nature of Earths, and their Action upon 

 Vegetation 14 



Article 1. Of Mould 15 



2. Of the Nature of Soils .... 18 



3. Of the Formation of Arable Lands . . 19 



4. Of the Composition of Arable Lands . . 24 



5. Of the Properties of the different Earths . 30 



6. Of the Properties of Mixed Earths, and 



the Methods of rendering them capable 



of a good Cultivation . . . .88 



7. Of the Analysis of Arable Soils . . 44 



CHAPTER III. 

 Op the Nature and Action of Manures . . .49 



Article 1. Of Nutritive Manures .... 50 



2. Of Stimulating Manures .... 06 



