SUGGESTIONS. 183 



is open, and a small envelope is attached by its 

 face to tlie 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 



