253 
be attacked by this disease. This may easily be 
proved in a Peach-House ; for let the border be 
kept dry, and keep the house for a few days in a 
steam, and the trees will soon Mildew, This 
circumstance I have observed for many years j 
I have uniformly found it to be the case. Mildew 
will also be produced from the soil of the border 
having’ been planted in for many years, and during 
that period not having had a renewal of fresh soil 
mixed with it. In that case a renewal of the border 
is indispensable in order to prevent the disease ; 
therefore it must always be endeavoured, in con- 
tinued foggy weather, to keep the border in a 
proper moist condition. This may be effected by 
giving it one good watering so that the water 
will sink to the depth and extent of the ffbrous 
roots, 
“ When the borders in which the trees are 
planted have a great inclination, so that rain will 
run quickly from them, the trees will be generally 
attacked by Mildew, and the leaves of the trees 
will also be frequently curled and blotched. In 
this case attention must be paid in watering, 
mulching, &c. When copings of walls ai’e so 
constructed that the drip from them falls upon the 
trees, it likewise frequently causes the Mildew. 
But if the directions given in this work in refer- 
ence to a proper soil for each kind of fruit tree, 
making of the borders, and watering the tops smd 
roots of the trees, be carefully attended to, they will 
be rarely attacked by the Mildew, 
