OF THE FERNS AND FLOWERING PLANTS. 
173 
have recourse to crushing or careful skinning and unrolling. 
. . . When parts are shrivelled or dried up, as is always 
the case in herbaria, they must be relaxed by immersion 
in boiling water. 
1 In all cases where dried flowers are to be dissected, the 
air should be driven out by boiling for a short time, before 
any attempt is made to separate their parts.’ — E d.] 
