iv 
PREFACE. 
raifed me from low cares, that I might attend to it, with that 
quietnefs cf mind which is required for works of Science : he 
fipports the garden where the Plants are raifed ; and he di- 
rects how the ftudy of them may be made moft ufeful. I am 
but as the hand which executes thefe great deligns. It is fuf- 
ficient glory for me to have been chofen for that purpofe ; nor 
can I wifL a greater happinefs than to be thus made inflrumen- 
tal to the good of mankind. 
Bays-vvatcr, 
Oa. 4, 1761. 
