62 Transactions of the Prussian Gardening Society. 



potatoes planted in moss in the same way as they usually are 

 in litter, though on a cold clay bottom, produce as good a 

 crop as if dung has been used. He also finds that green moss 

 laid in a heap becomes warm in a few days, and therefore 

 thinks it may be serviceable in forming hot-beds. " The de- 

 composition will be very gradual, and the heat moderate and 

 of long duration." A medal was very properly voted to Mr. 

 Street for his experiments on this subject. 



The remaining papers will be abridged in our succeeding 

 Number. 



Art. III. Verhandlungen des Vereins zur Beforderung des Gar- 

 tenbaues in den Koniglich Preussischen Staaten. Transactions of 

 the Society for the Advancement of Gardening in the Royal Prus- 

 sian States. Part II. completing Vol. I. Berlin. 4to. 1824, 

 7 Plates. 



This part contains twenty-six articles, a number of which 

 may be glanced over with advantage. 



39. Account of what passed at the Meeting held June 6. 1823. 



It was observed that the cocoa-nut palm, in its native 

 situations in the East Indies, was frequently watered by the 

 spray of the sea, and that the court gardener, Jacobi, had 

 grown palm plants successfully in soil impregnated with salt- 

 petre, as a compensation for salt water. 



[The shores of the most exposed part of the island of Cey- 

 lon are skirted by a natural forest of cocoa trees, which forms 

 a protecting screen to the vegetation of the interior.] 



40. Some Observations on the Effects of the Frost on Vegetables, 

 during the Winter of 1822-3. By Professor Link, of the 

 University of Berlin. 



Plants, the construction of whose stems is formed by suc- 

 cessive rings or layers of fibre, are less liable to be destroyed 

 by frost, than such as are formed of only one ring or layer of 

 fibre, though the stem in the one case should be as thick as 

 in the other. It would follow from this deduction from ex- 

 perience, that monocotyledonous plants should be more easily 

 destroyed by frost than dicotyledonese, herbaceous plants 

 more easily than trees, and stems and young shoots of one 

 year's growth more easily than those of three years' growth, 

 which is believed to be the case. When frost has destroyed 

 part of the tree or plant, it is not considered advisable to cut it 

 down, but to leave it to push wherever it can, and afterwards 



