10 
moved from this paper to other that is fresh and dry, 
and again submitted to the same pressure. After a 
few days, the change may be at greater intervals, until 
the specimens become perfectly dry, Then they are 
to be removed to the paper in which they are to be per. 
manentiy kept, in which condition, an interval of one 
sheet is sufficient between each specimen. If this care 
be not taken, the specimens are liable to turn black 
and be ruined. 
As soon as a specimen is collected, a label should be 
prepared and placed with it, and constantly kept with 
it in all its transfers. This label should state the place 
and time of collection ; whether the plant be of land or 
of water ; it the latter, fresh or salt, the kind of soil in 
which it grows ; its name, where found ; its uses, if 
any ; its mode of manufacture, if converted to useful, 
or other purposes ; the color and odor of its flowers, and 
any thing else interesting or important connected with 
it, 
The collector must not refuse to collect a specimen 
because he thinks it common at the place to which he 
wishss to send his collections. It is an important ques- 
tion to determine the geographical distribution of the 
vegetable kingdom, and this can only be done by know- 
ing the various localities in. which a plant may be found. 
Sea weeds should be immersed a few hours in fresh 
water before they are put up. 
If possible, the collector should obtain the fruit or 
seed, not only of the specimens collected, but of any 
other vegetable. These should be wrapped up careful- 
ly with a label. They should be retained in or accom- 
panied by the pod, capsule, or other covering in which 
