Bulletin - United States National Museum - Smithsonian Institution
Bulletin - United States National Museum - Smithsonian Institution
Bulletin - United States National Museum - Smithsonian Institution
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236 FLORA OF WASHINGTON AND VICINITY.<br />
should be mounted. It will not do, however, to mount them without<br />
comparison with those on hand, for in the majority of cases your sheet<br />
will not be full and the new plant can be added to it, which, aside from<br />
the question of economy, is far more scientific than to have them on<br />
separate sheets.<br />
Not only with regard to summer, but to all winter accessions, the<br />
number added should be carefully noted and footed into the running<br />
account, so that the whole number in the herbarium may be at all times<br />
known. It is more difficult to have easy access to any name and be<br />
able to say with certainty whether you have it or not. Some merely<br />
mark their books and catalogues where the plants are enumerated and<br />
depend upon finding them in this way, but this is a clumsy method, not<br />
to be recommended. If there is a large comprehensive check-list, like<br />
Mami'S Catalogue, it is well to devote one to this purpose, and so far as<br />
the plants there enumerated are concerned, this will show whether you<br />
have them or not. But you will be sure in time to get plants not found<br />
in any such check-list. Of course lists of such can be kept, and<br />
should be, but eventually they will become inconvenient. Plants will<br />
reach you of which no book in your library, and none accessible to you,<br />
contains a description. What shall be done with these? After a great<br />
amount of trouble of this kind I have found myself driven at last to the<br />
adoption of the card-catalogue system for my entire herbarium, and so<br />
charmingly does it work that I do not hesitate to commend it to the pro-<br />
fession, and to advise beginners to commence with it and keep it up.<br />
This perhaps need scarcely be described, but I may briefly say that it<br />
consists of a drawer of cards, alphabetically arranged, on which are writ-<br />
ten the names of all the plants in the herbarium. All necessary details<br />
may be obtained by a visit to any large library and an inspection of its<br />
card system.<br />
When a package of plants is received, or in any way comes up for<br />
final disposition, it is opened and the first specimen is examined. If<br />
already represented in the herbarium, it is put into the pile to be com-<br />
pared. If there be any doubt, the cards are consulted; if not found, a<br />
card is immediately written and slipped into its place in the drawer: the<br />
plant is then placed in the package to be mounted. In this way no new<br />
plant ever finds its way into the herbarium without its card having been<br />
first added to the card-catalogue.<br />
The vast multiplicity of different objects to be handled in making a<br />
herbarium, and the variety of ways in which they require to be disposed