COLLECTING 17 
changed twice each of the first two days, then the cloths should 
be removed and the specimens left in press for a week, the 
blotters being changed daily. Be sure that the specimens are 
perfectly dry before placing them in the herbarium. Label each 
specimen with the name and the date and place of collection. 
There are some seaweeds which cannot be treated in the above 
manner. Fucus if placed in fresh water soon becomes slimy. 
It is so full of gelatine that it soon destroys blotters; therefore 
it is well to hang it up for several hours and then place it between 
newspapers, which should be frequently changed, and as the 
plant becomes pliable it should be arranged in proper position. 
Those specimens which do not adhere to paper in drying should 
be secured with gum. When it is impossible to mount speci- 
mens at the time they are collected, they can be preserved by 
drying; afterward they can be soaked and mounted in the usual 
manner. To dry the plants, lay them separately upon boards 
without pressing out the sea-water, and leave them in an airy, 
shaded place until thoroughly dry; then pack them loosely into 
boxes and label, giving date. and locality. Blotters or driers can 
be obtained at botanical-supply stores at thirty-five cents per 
quire. 
HOW TO ARRANGE A HERBARIUM 
The standard herbarium-paper is sixteen by eleven and a half 
inches. The sheets are single, white, smooth, and quite heavy. 
These, together with folded sheets of yellow manila paper, called 
genus-covers, are the only requisites. It is desirable to have also 
a case of shelves protected by glass doors. The shelves should 
be twelve by eighteen inches, and four to six inches apart. They 
are more convenient when made to slide like drawers. 
The different species of one genus are gummed on one or more 
of the white sheets and placed within the folded manila paper, 
which serves as a cover. Each specimen should be signed with 
its name, place, and date of collection, thus: 
C. rubrum. Bar Harbor. Aug. 12, 1899, 
' the generic name being indicated by its initial capital letter and 
the specific name written in full. To this are often added the 
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