59 it Transactions of the Prussian Gardening Society. 



pares them for germination when sown in the following 

 spring. 



23. On O'xalis telraphylla as an ornamental Plant, and as a Vege- 

 table. By M. Witzel, Gardener. 



This plant is used for ornament, especially for edgings. It 

 is also very good used as sorrel, and the bulbs are almost 

 like potatoes in flavour; the leaves, when mixed with New 

 Zealand spinach, give it a peculiar and pleasant acid flavour. 

 The plant is very easily cultivated ; it grows almost in any 

 soil, and increases its bulbs abundantly. If planted in a 

 frame in spring, it may be obtained earlier. 



24. Extract Jrom the History of the Gardens at Worlitz. 

 By M. Schoch, Gardener. 



The gardens at Worlitz are about six English miles in cir- 

 cumference, on a plain which is variously subdivided by canals 

 for pleasure-boats. The whole, however, is subdivided into 

 five different parts. Around the castle it is chiefly laid out 

 in the English style, and contains a great number of various 

 North American trees and shrubs, which were among those 

 first introduced in Germany. In the years 1 770 — 1 774- another 

 part was laid out on one of the islands in the garden, where 

 a considerable piece of rockwork is erected in the form of a 

 grotto. This is surrounded by fig trees, which in winter are 

 bent into the interior of this grotto for protection against 

 frost. In the centre of this mass of stones is a cavity for an 

 artificial volcano, which, when displayed, affords a beautiful 

 spectacle by the reflection from the artificial lake and canals. 

 There is also a nursery for the supply of the gardens, 



26. Account of Dreienhrunnen, near Prfurth. By Dr. Volker. 

 This place has long been distinguished for the extensive cul- 

 ture of vegetables. The kitchen-gardens are variously crossed 

 by trenches supplied with water by three large reservoirs, for 

 the purpose of watering. This is performed with a sort of 

 shovel, with which the water is spread over the beds. On 

 the sides of these trenches water cresses are grown abundantly. 

 Fruit trees are not much cultivated in these gardens, as they 

 are considered injurious to the growth of the water cress. 



27. On the Cultivation of Orange Trees. By M. Mertens, at 

 Herrnhausen. 



He re-pots his trees every sixteen or twenty-four years. 

 The soil consists of two parts cow-dung, two parts loam, 

 three parts rotten horse-dung, and three parts of the old soil 

 from the pots. They are occasionally watered, and fresh 



