By the Chevalier Francis de Paula Schrank. 397 



ones, being displaced, or at least hidden from the eye : at 

 the same time the narrow bridges, particularly in large ponds, 

 which one might think of constructing, would require to be 

 too close together, if designed both to facilitate the examina- 

 tion of the plants growing in the pond, and to afford security 

 to the botanist. 



The botanic garden at Munich was originally laid out by 

 the Chevalier Sen ell, Keeper of the Royal Gardens. His 

 object, in this undertaking, was to establish the main points, 

 and to provide for what was essentially necessary, at the same 

 time leaving room for such future improvements, as might 

 appear, according to circumstances, requisite and advisable. 

 In this state the garden was intrusted to me. I found it in- 

 cumbent upon me, at the outset, to represent to the Govern- 

 ment, that I felt the want of two things in this garden, other- 

 wise admirably laid out, viz. a rock work, and a place for 

 the growth of aquatic and bog-plants. The Chevalier 

 Schell was accordingly charged to supply both those 

 wants, and to consult with me upon the subject. The plan for 

 a rock work, as applicable to a botanic garden, I have sub- 

 mitted to our Academy of Sciences, in whose Transactions 

 it will appear. With respect to the aquatic plants, 1 com- 

 municated to the Chevalier Schell the difficulties above 

 mentioned, owning, at the same time, that I knew of no 

 remedy. He proposed to me canals, or trenches, constructed 

 of brick-work or masonry, to which I objected their want of 

 durability, and their liability to be disjointed and destroyed 

 by the plants themselves. For whereas, according to Brugg- 

 man's accurate observations, plants secrete through their 

 roots fluid particles, which are of an acid nature; as soon 



