till 
INTRODUCTION. 
in clouey weather, and with water which has been exposed, one 
day at least, to the shining of the sun ; not with water directly 
from a well, or a cold spring, as it will give a chill to the plants. 
Only a small quantity should be applied at once, that it may 
have an effect similar to that of a refreshing rain; for water, 
applied too plentifully, sometimes washes away the finest of the 
mould from the roots, or makes little cavities about them, which 
admit too much air. 
