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XXIII. 4 New Méhod of preferving Fungi, &c. By William - 
WitherM:3; M. D. F, R. S. and FLL S. 
Read Dec. 4, 1792. 
p DROM a conviction. phat many of the difficulties attendant 
upon the ftudy of the Agarics, and fome other genera of 
Fungi, arofe from the want of a method of preferving them in a 
ftate fit for comparifon one with another, I attempted fome years 
ago to accomplifh this purpofe, by immerfing them in various 
chemical liquids, and after fome trials found it poffible to preferve 
their habit completely, and in fome meafure alfo their texture 
and colours. By the fame methods I alfo found that Moffes and - 
Lichens might be preferved in great perfection. 
A continued attention to this fubje& gave rife to a great num- 
ber of experiments; but I fhall not trouble the Society with the 
detail of them, rather confining myfelf to a more particular de- 
fcription of the two methods which I have found moft practicable 
.and efficacious, and only curforily mentioning fome of thofe that 
have failed. 
No. I. 
