That wax is also an exudation from the leaveSI 

 of plants, appears from the experiments re-» 

 corded by Di". Thomson in his Chemistry, 

 V. 4. ^298, and it has been long ago asserted 

 that wax may easily be gathered from the 

 leaves of Rosemary. On this subject I have 

 not made any experiments to satisfy my- 

 self. 



With respect to the absorbing power of 

 leaves, the host observations that have been 

 made are those of Bonnet, recorded in the 

 beirinnino: of his Rcchei'ches sur VUsa^e cles 

 Feuilles. His aim was, by laying leaves of 

 various plants upon the top of a jar of water, 

 some with their upper, and others of the 

 same species with their under, surfaces ap- 

 plied to the water, to discover in which situa- 

 tion the leaves of each plant continued longest 

 in health and vipour, and also how far dif- 

 ferent species differed from each other in this 

 respect. The results were in many instances 

 highly curious. 



Of fourteen herbaceous plants tried by this 



prove honev-dew to be the dung of Jph'ides. I only 

 contend that there are more ihaa one kind of honey- 

 dew. 



