SILK-WORMS. 
19 
adapted to that purpose, fixed upon a rod, and 
drawn by small cord, which gives action to the 
instrument ; these boughs may be cut off with 
great ease. 
Thus each nest destroyed, diminishes by two, 
or three, or four hundred, the quantity of cater- 
pillars that would have attacked the tree. 
Those who have not made use of these means 
which, in winter, are easy, should at least do so 
immediately after the spring showers, as the 
young caterpillars that have escaped the rain, 
retire into their nests, which may be easily dis- 
covered when some green or dried leaves are 
observed fastened and stuck together with the 
silky down of the caterpillar. 
Those who have hedges near their gardens, or 
enclosures, should clip them in the winter, to 
prevent the caterpillars that harbour in them 
from falling upon their fruit-trees. 
When the caterpillars are grown large, and 
are scattered about the shrubs, it is most difficult 
to prevent their ravages. They can be stupTfied 
by fumigation, and thus be made to drop off. 
This may be done by burning w*et straw in an 
iron caldron or brass pan, Avith a long handle, 
(Fig. 2.) and adding a little brimstone, putting 
the fire at the necessary height that the smoke may 
reach the nests. When the smoke penetrates the 
parts where the caterpillars hang, the tree must be 
