190 
OF THE HERBARIUM. 
lay liis hand on any wished -for specimen ? This is easily 
effected by the simple process of numbering the tickets 
outside the wrappers, one set of numbers for the genera, 
and another for the species in each genus, the orders 
being distinguished by Roman figures. Whatever sys- 
tematic work the student has taken as his guide in the 
arrangement of his herbarium may be made the ground- 
work of his numbering. Should the work in question not 
be numbered, the student will have no difficulty in going 
himself through the volume, first marking the genera 
from beginning to end with consecutive numbers, and then 
the species, in these confining the consecutive numbers to 
a single genus. All that is requisite now is to look 
into the index of the book for the genus to which the 
desired specimen belongs, and to ascertain its number. 
Then, by keeping his eye on the external labels of the 
herbarium, the student can find the specimen without 
being compelled to open any but the right packet, and 
also with the least expenditure of time. A specimen can 
be replaced in the same simple manner. Of course the 
descriptive tickets accompanying the examples are also 
numbered ; and the search is much facilitated, if a list of 
the genera contained in each order, or at least a list of 
their reference numbers, is slipped under the string or 
strap enclosing the fascicle. 
When the herbarium has grown to a large size, so that 
individual packets are less frequently consulted, it is well 
to wrap the separate fascicles in paper, or, better still, in 
linen, bringing the ends well round, so as to overlap the 
centre, and tying them together by two strings fastened to 
the opposite corners of the covering material. Each string 
is carried right round the bundle, and looped in again, 
where its other end is attached to the linen cover. If 
paper is employed, the pasteboard covers must be placed 
over and under it, to keep it in place. In either case the 
list of enclosed genera may be slipped under the outside 
fastening. 
