[ *34 ] 
mg. Its buds open, it bears loaves, and even 
fhoots, which fometimes are very long, and muft 
be the effects of the lap it contained. It is true, 
indeed, that this appearance does not continue 
long, becaufe the provifion of fap once exhaufted, 
without being renewed, every thing muft of ne- 
cefiity perifh. 
An effedt of the like kind often deceives us in 
trees, that have been newly planted, and in fcions, 
which produce flowers and even fruits, without 
ever having taken root. But in this cafe the 
fymptoms, which would feem to promife life, 
are on the contrary the forerunners of death ; be- 
caufe the leaves, being from their nature the moft 
powerful organs of tranfpiration and diflipation, 
the graft is the more readily exhaufted, when 
there is no root to furnifh it with a frefh fupply 
of nutritive juices. 
III. This experiment proves that it is heat, 
which unfolds the leaves, and produces the other 
parts of fructification, in the branch expofed to 
its adtion. 
Autumn is the time, in which Nature employs 
itfelf as it were clandeftinely, under the cover of 
the leaves, in forming the buds, which contain 
the rudiments of the leaves, blofloms, and fruits, 
that are to be produced in the courfe of the fuc- 
ceeding fummer. Thefe buds prepare and work 
themfelves out, during the winter, under the rough 
coats, that are deftined to preferve them from 
the injuries of the weather. As foon as the warm 
weather in the Ip ring begins to be felt, the buds 
open, and their coats, which then become ufelefs, 
drop off, and give place to the productions, which 
they 
