AN HERBARIUM. oil 



are pasted, as the spirit extracts a yellow dye 

 from many plants, and stains the paper. A 

 few drops of this solution should be mixed 

 with the glue used for pasting. This apph- 

 cation not only destroys or keeps off all ver- 

 min, but it greatly revives the colours of 

 most plants, giving the collection a most 

 pleasing air of freshness and neatness. After 

 several years' experience, I can find no in- 

 convenience from it whatever, nor do I see 

 that any dried plants can long be preserved 

 without it. 



The herbarium is best kept in a dry room 

 without a constant tire. Linni^us had a stone 

 building for his museum, remote from his 

 dwelling-house, into which, I have been told, 

 neither fire nor candle was ever admitted, 

 yet nothing can be more free than his collec- 

 tion from the injuries of dampness, or other 

 causes of decav. 



