V1U CONTENTS. 



Seeds. Of the Functions of Plants in their different 

 Stages of Growth ; with a general view of the progress 



of Vegetation - 18." 



LECTURE VI. 



Of Manures of vegetable and animul Origin. Of the man- 

 ner in which they become the Nourishment of the Plant. 

 Of Fermentation arid Putrefaction. Of the different 

 Species of Manures of vegetable Origin ; of the differ- 

 ent Species of animal Origin. Of mixed manures. 

 General Principles with respect to the use and applica- 

 tion of such Manures - - 239 



LECTURE VII. 



On Manures of mineral Origin, or fossile Manures ; their 

 Preparation, and the Manner in which they act. Of 

 Lime in its different States ; Operation of Lime as a 

 INIanure and a cement ; different combinations of Lime. 

 Of Gypsum ; Ideas respecting its use. Of other Neu- 

 tro-saline Compounds, employed as Manures. Of Al- 

 kalies and alkaline Salts ; of common Salt - 276 



LECTURE VIII. 



On the improvement of Lands by Burning ; chemical 

 Principles of this Operation. On Irrigation and its ef- 

 fects. On Fallowing ; its disadvantages and uses. On 

 the convertible Husbandry founded on regular rotations 

 of different Crops. On Pasture. On various Agricul- 

 tural Objects connected with Chemistry. Conclusion 30f 



APPENDIX, 



An account of the Results of Experiments on the Produce 

 and Nutritive Qualities of different Grasses; and other 

 Plants, used as the Food of Animals. 



