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Callithamnia, require to be only a few minutes in fresh water; and 
the genus Griffithsia cannot endure fresh water at all, but when im- 
mersed in it, dyes it carmine, the plant itself being deprived of its 
colour. Such plants should be laid out in clean sea-water, and as 
speedily as possible after being gathered. 
“Stout cream laid, or hotpressed drawing-paper, of uniform size, 
saturated with sweet oil, by the aid of a broad camel’s-hair brush, 
should be used. Lay the pieces one over the other and repeat the 
saturation ; then bake them in an oven not overheated, and it is best 
to leave them for one night or longer, until they are well baked. 
Float out the specimen in fresh water in a broad shallow dish, white 
bottomed, and without any pattern in colours, and bring the oiled 
paper underneath the seaweed, and withdraw it carefully with the 
plant from the water, so as to leave the natural appearance of its 
ramuli. It is best to withdraw it by one corner, and to turn it almost 
round extremely gently, sometimes assisting the development with 
the point of along pen. Lay the paper thus withdrawn on a very 
slightly inclined board, in order to allow the water to drain off ; and 
in a few minutes, or even sooner, when the water has escaped, lay 
the oiled paper with the specimen upon it on white blotting-paper 
folded in quarto. Spread over the specimen most carefully a piece of 
old cambric, or fine muslin, or very fine lawn, and on this lay more 
blotting-paper, and so on. Over all this place a heavy book or 
weight to press them; but remember to place less weight on the 
finer than on the coarser seaweeds. Change the blotting-paper 
at least every six or eight hours, with great care not to disturb the 
coverings of the specimens, else it would spoil their arrangement. 
Kach time the blotting-paper becomes damp, it must be well dried 
and pressed smooth before being used again. After the third change 
of the blotting-paper, you may remove the muslin or cambric with the 
specimen already dried, if a delicate one (coarse ones require six or 
seven changes), and again place it between dry blotting-paper, laying 
aside the oiled paper to be dried for future use. Next, remove the 
specimen most carefully from the muslin or cambric, and fix it 
by means of narrow strips of paper to the cream laid paper, adding 
on the outside the name, class, order, family, &c. 
“At first you require to be very careful, but experience will 
familiarize you with the proceedings. This description is derived 
from my own long experience, having tried many plans and found 
none better than the above. Some of the finer and rather gelatinous 
plants are difficult to remove even from the oiled paper, and in this 
