COLLECTION AND PRESERVATION OF SPECIMENS. 75 



the board a weight of about 60 pounds, so arranged as to 

 give an equal pressure. For the first three or four days 

 change the paper daily, replacing it with dry sheets ; 

 straighten any leaves which may be out of their natural 

 position ; and correct any other faults, before the specimens 

 stiffen. After that period change the paper twice, on 

 alternate days. After a week's pressure, remove the speci- 

 mens and place them between clean sheets of paper, where 

 they may be allowed to get finally dry. Carefully followed, 

 these instructions will enable any person to form a collec- 

 tion of these graceful plants. After any specimens are 

 thoroughly dried, all that is necessary to preserve them 

 is to keep them in a portfolio with covers heavy enough 

 to give a moderate degree of pressure. 



Mounting. — This must be done according to taste. The 

 plants may either be stitched, gummed, or glued to stiff 

 paper. Camphor will be found useful in preventing the 

 attacks of ants and other insects. 



