X 
CONTENTS. 
LECTURE V. Page 
On the Nature and Constitution of the Atmosphere, and 
its Influence on Vegetables. Of the Germination of 
Seeds. Of the Functions of Plants in their different 
Stages of Growth ; with a general View of the Progress 
of Vegetation - - - - - 189 
LECTURE VI. 
Of Manures of vegetable and animal Origin : of the Man- 
ner in which they become the Nourishment of the 
Plant. Of Fermentation and Putrefaction. Of the 
different Species of Manures of vegetable Origin : of 
the different Species of animal Origin. Of mixed 
Manures. General Principles with respect to the Use 
and Application of such Manures - 243 
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 
Manure and a Cement. Different Combinations of 
Lime. Of Gypsum : Ideas respecting its Use. Of 
other Neutro-saline Compounds, employed as Manures. 
Of Alkalies and alkaline Salts. Of Common Salt - 280 
LECTURE VIII. 
On the Improvement of Lands by Burning Chemical 
Principles of this Operation. On Irrigation and its 
Effects. On Fallowing : its Disadvantages and Uses. 
On the convertible Husbandry founded on regular 
Rotations of different Crops. On Pasture. Views con- 
nected with its Application. On various agricultural 
Objects connected with Chemistry. Conclusion - 311 
APPENDIX. 
An Account of the Results of Experiments on the Pro- 
duce and nutritive Qualities of different Grasses, and 
other Plants, used as the Food of Animals - - 339 
