SUGGESTIONS. 185 



is open, and a small envelope is attached by its 

 face to the same page at the bottom, in which loose 

 specimens are kept for minute and special exami- 

 nation, or as duplicates. When the sheet is folded, 

 the specific name is written at the right-hand lower 

 corner, or, what is better, a strip containing that 

 name and its number is cut from a copy of the 

 (< Index Fungorum," kept for the purpose, and 

 gummed in its place. The remainder of this page, 

 which is of white cartridge paper, is occupied with 

 memoranda referring to the species enclosed, 

 sketches of the spores, synonyms, references to 

 descriptions, &c. All the species-papers of each 

 genus are placed together within a sheet of brown 

 paper, half an inch larger in each direction, with 

 the name of the genus written at the left-hand 

 corner. A piece of millboard, the size of the covers 

 when folded, separates each order. 



When a leaf, or other portion of a plant, is to be 

 examined under the microscope, with the view of 

 determining the genus and species of its parasite, 

 it may be fastened with small pins to a piece of 

 sheet cork, two or three inches square, and about 

 one-eighth of an inch in thickness, such as used 

 for lining entomological cabinets, and so placed 

 under a lens that it may easily be brought into 

 focus, and both hands left at liberty; or a dissecting 

 microscope may be used for the purpose. From 

 one of the pustules the spores may be removed on 

 the sharp point of a penknife, and placed in a drop 



