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effects of frofts. In the following parts of the year, 
the term blight is applied to the ravages of other 
caterpillars, fometimes {tripping off the leaves of a 
whole tree, or leaving nothing but the rigid fibres; 
and fometimes it is applied to the too copious perfpi- 
ration of a tree, the effec of a fudden and intenfe 
fun; in which cafe, the plant is covered over with 
a faccharine vifcid mucilage—of this treacly fub- 
ftance a great number of infects arefond. But it is 
owing, I believe, to a general rupture of the vef- 
fels, and fo exhanfts the plants as fometimes to 
kill them. 
Did the difeafe originate in the aif, or were in- 
fe&ts brought by the air, we fhould expect the con- 
tiguous trees, fhrubs, &c. alike affected; but this is 
not the fact. The leaves of lime trees are conftitu- 
tionally fubjeét to this faccharine exudation, without 
any fenfible injury. 
6. Are bees favourable or otherwife, to the growth 
of thofe plants, from the flowers of which they extra 
their honey ? 
7. What feafons are fuppofed to be the moft favour- 
able for the produttion of the different kinds of infects ® 
And are there any precautions that can be taken 
againft them? 
Early fummers give them an opportunity of mul- 
tiplying jtheir generations. 
8. Are there any plants, or fbrubs, the Pid of 
which is deftructive to infecis? 
Elder, 
