182 MICEOSCOPIC EUNGI. 



date and locality^ to whicli^ after microscopical 

 examination^ the name may be added. Wtien 

 thoronglily dry^ your leaves may be preserved for 

 reference in old envelopes^ with the particulars 

 endorsed on the outside. Fungi on leaves will 

 generally be examined to the greatest advantage 

 in the fresh state_, but if too much pressure is not 

 employed in the dryings it will not be difficult even 

 in that condition to make out their characteristic 

 features. Care must be taken^ by changing their 

 position_, that, moulds of other kinds do not es- 

 tablish themselves upon the specimens in drying, 

 or that when dried they do not fall a prey to Euro- 

 tium herhariorum. 



If it is intended to add these leaves to your 

 herbarium^, or to form a special herbarium for them, 

 they should be mounted on white paper, first by 

 affixing one or two leaves by means of thin glue 

 to a paper about four inches square, on which the 

 name, date, and locality may be written, and 

 attaching several of these speae^-papers to a larger 

 or gefius-ipsb^eYy or by devoting each larger paper 

 to a species, adding in future other varieties, and 

 enclosing all the 5pea(35-papers of the same genus 

 within a folded sheet, on which the name of the 

 genus is written. 



We have adopted, for our own herbarium, the 

 ^^ foolscap ^^ size. A sheet of paper receives within 

 its fold the specimens of a single species ; these 

 are affixed to the right-hand page, when the sheet 



