BOTANICAL INFORMATION. 373 



Kinn, and perhaps all the American species described by 

 Willdenow from the Berlin garden. It also comprises a 

 portion of the herbarium of Pallas, the Siberian plants of 

 Stephen, and a tolerable set of Humboldt's plants. This 

 herbarium is in good preservation, and is kept in perfect 

 order and extreme neatness. As left by Willdenow, the 

 specimens were loose in the covers, into which additional 

 specimens had sometimes been thrown, and the labels often 

 mixed, so that much caution is requisite to ascertain which 

 are really authentic for the Willdenovian species. To pre- 

 vent farther sources of error, and to secure the collection 

 from injury, it was carefully revised by Prof. Schlechtendal, 

 while under his management, and the specimens attached by 

 slips of paper to single sheets, and all those that Willdenow 

 had left under one cover, as the same species, are enclosed 

 in a double sheet of neat blue paper. These covers are 

 numbered continuously throughout the herbarium, and the 

 individual sheets or specimens in each are also numbered, so 

 that any plant may be referred to by quoting the number of 

 the cover, and that of the sheet to which it is attached. 

 The arrangement oi^ the herbarium is unchanged, and it 

 precisely accords with this author's edition of tlie Species 

 Plantarum. Like the general herbarium, it is kept in neat 

 portfolios, the back of which consists of three pieces of broad 

 tape, which, passing through slits near each edge of the 

 covers, are tied in front ; by this arrangement their thickness 

 may be varied at pleasure, which, though of no consequence 

 in a stationary herbarium, is a great convenience in a grow- 

 ing collection. The portfolios are placed vertically on 

 shelves protected by glass doors, and the contents of each 

 are marked on a slip of paper fastened to the back. The 

 herbaria occupy a suite of small rooms distinct from the 

 working rooms, which are kept perfectly free from dust. 



Another important herbarium at Berlin, is that of Prof. 

 Kunth, which is scarcely inferior in extent to the royal col- 

 lection at Schoneberg, but it is not rich or authentic in the 

 plants of this country. It comprises the most extensive and 



