Q INTRODUCTION. 
When a collection of dried plants is thus made, 
they are to be laid each in a sheet of white paper, 
and arranged according to some system, and kept 
in, a close locked cabinet, that they may not be eaten 
by insects. In the drawers likewise of such a cabi- 
net may be placed small bits of spunge moistened 
with oil of rosemary or cajaput wraptin paper, by 
which these depredators are kept off: even by fre- 
quent perusal the collection is preserved. 
Some botanists, and Linneus himself, advise the 
gluing or pasting of the plants to the paper. But 
many inconveniences attend this practice; for in this 
case we can only see one side of the leaf or of the 
flower, and when it is small we can hardly see it at 
all. For a botanist it is much more convenient to 
keep the plant loose, because it is often neces- 
sary with the help of warm water to unfold the 
flowers and observe their form; and he can substi- 
tute a better specimen occasionally for an indiffer- 
ent one, which is not so easily done when the plant 
is pasted. If a person, however, wishes to fix his 
plants, he may use slips of paper laid over the stem, 
and pasted on each side, or he may fix them with a 
thread. 
-But an Herbarium alone is not sufficient for the 
purposes of a botanist; he must likewise collect 
and preserve the seeds of most plants and their fruit, 
especially those that can be easily kept, and he will 
find an acquaintance with these of great importance 
to him, 
The 
