148 



LEAVES 



immersing the specimens in absolute alcohol for a short 

 time to remove any water which may be in them. Then 

 transfer them to xylol, after which they may be mounted 

 in a drop of Canada balsam. 



Whole leaves skeletonized may be placed between plates 

 of glass, and passe partout tape or gummed paper may be 

 used to bind the plates together. 



The Use of Blue Prints in Leaf Study 



Lay leaves of all forms upon sheets of blue print 

 paper, arranging them with reference to . different forms 



or other character- 

 istics. 



This should be 

 done in a shady or 

 semidark room. 

 Cover them with a 

 glass plate and then 

 expose them to di- 

 rect sunlight for two 

 to five minutes. Then 

 remove them to a 

 shady place and wash 

 them thoroughly in 

 pure water for five 

 minutes. 



These blue prints 

 can be dried between 

 blotters and mounted 

 while still damp or 

 kept unmounted for 



FIG. 60. Specimen of blue print work. reference. 



