xvi . Preface. 
coveries and experiments, will be enabled to ren- 
der this manure: still more valuable, by the most 
judicious modes of application. It will then be 
felt by the cultivators of our soil, that sccence essen- 
tially promotes their interests and happiness. A 
practical conviction of the advantages derived 
from it, will urge them to afford to literary establish-_ 
ments, and men of useful learning, the public and 
individual support they so justly merit, 
RICHARD PETERS, 
January 3d, 1797. 
